Child development stages

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up-side down, turn it upright, and pour water from a given cup into the glass. Once the children begins to grab the upside-down glass with thumb pointing down, then they have displayed end-state comfort. As a result, once they have turned over the glass, the child would have ended with palm holding the glass in a comfortable position.

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construed. Developmental norms are sometimes called milestones – they define the recognized development pattern that children are expected to follow. Each child develops in a unique way; however, using norms helps in understanding these general patterns of development while recognizing the wide variation between individuals.

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Motor planning includes an individual's choice of movements and trajectory of such movements. Children begin to display motor planning in preference of certain body parts such as hand preference. For instance, left-handed children will start to plan how they can perform a motor skill, like throwing a

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theories. This article discusses the most widely accepted developmental stages in children. There exists a wide variation in terms of what is considered "normal", caused by variations in genetic, cognitive, physical, family, cultural, nutritional, educational, and environmental factors. Many children

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Holistic development sees the child in the round, as a whole person – physically, emotionally, intellectually, socially, morally, culturally and spiritually. Learning about child development involves studying patterns of growth and development, from which guidelines for 'normal' development are

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ESC is the preference to initially use unusual uncomfortable postures and movements to end in a comfortable position. One common method of studying end-state comfort is the task of over-turned glass. In this task, individuals are asked to use one hand to pick up a drinking glass that is placed

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Overall disposition is pleasant and upbeat. Can become extremely excited over subjects of interest or accomplishments. Strongly prone to peer pressure and following trends. More stable friendships with fewer melodramatics than at 11. May begin to have sexual attraction to/interest in peers.

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Approximate outline of development periods in postnatal human development until what generally is regarded as adulthood. There are no universally unanimous definitions, so they vary considerably, but generally fall within the faded intervals at the flanks of the

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By this age, infants may have doubled their birth weights. They typically grow about 0.8 inches (2.0 cm) and gain about 1 to 1.5 pounds (450 to 680 g) during this month. Fat rolls ("Baby Fat") begin to appear on thighs, upper arms and

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Explore genitalia with other children their age. This occurrence typically begins with children "playing doctor" or who say "show me yours and I'll show mine." The event is the child showing interest in "naughty parts" which are perceived as

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Holophrastic speech: uses one word to convey an entire thought; meaning depends on the inflection ("me" may be used to request more cookies or a desire to feed self). Later, produces two-word phrases to express a complete thought

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Bertsch, C., Unger, H., Winkelmann, W., & Rosenbaum, D. (2004). Evaluation of early walking patterns from plantar pressure distribution measurements. First year results of 42 children. Gait & Posture, 19(3), 235.

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The hip and knee joints are more strongly coupled than the shoulder and elbow joints in interlimb comparisons. This may be due to the weight bearing the hip and knee joints go through for standing and walking.

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Begins to assert independence; often refuses to cooperate with daily routines that once were enjoyable; resists getting dressed, putting on shoes, eating, taking a bath; wants to try doing things without

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Early in this period, the child always searches in the same location for a hidden object (if the child has watched the hiding of an object). Later, the child will search in several locations.

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Releases objects or toys by dropping or throwing; cannot intentionally put an object down because infants, at eight months, are not using visual sensory information while grasping an object.

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Capable of categorizing information to make better sense of it. Reads adult books and magazines on subjects of interest. Capable of proofreading homework for spelling, grammar, and logic.

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Moods change rapidly and unpredictably; laughing one minute, crying the next; may throw tantrum over minor frustrations (a block structure that will not balance); sulk over being left out.

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Continues to use physical aggression if frustrated or angry (for some children, this is more exaggerated than for others); Physical aggression usually lessens as verbal skills improve.

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Able to stand with help and bounce while standing. An explorative study found, however, that 3- to 5-month-old infants can be taught independent standing, which was considered safe.

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Helps feed self; enjoys holding spoon (often upside down) and drinking from a glass or cup; not always accurate in getting utensils into mouth; frequent spills should be expected.

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Insists on trying to do things independently, but may get so frustrated as to verge on tantrums when problems arise: paint that drips, paper airplane that will not fold right.

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Children first recognize when to apply muscular force when walking in order to conserve energy; soon after, children learn to fine-tune muscle tissues to stabilize themselves.

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Changes tone of voice and sentence structure to adapt to listener's level of understanding: To baby brother, "Milk gone?" To Mother, "Did the baby drink all of his milk?"

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Relies (most of the time) on verbal rather than physical aggression; may yell angrily rather than hit to make a point; threatens: "You can't come to my birthday party."

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Seems aware of reciprocal (back and forth) aspects of conversational exchanges; some turn-taking in other kinds of vocal exchanges, such as making and imitating sounds.

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Growth spurts, ejaculations and voice changes are common in boys, as well as "peach fuzz", small strands of facial hair above their lip along with fine underarm hair

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Head size increases slowly; grows approximately 1.3 cm (0.51 in) every six months; anterior fontanelle is nearly closed at eighteen months as bones of the

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Typically grows at a similar rate to the previous month, usually growing between 1 and 1.5 inches (2.5 and 3.8 cm) and gaining about 2 pounds (910 g).

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Hearing acuity can be assessed by child's correct usage of sounds and language, and also by the child's appropriate responses to questions and instructions.

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Enjoys the challenge of puzzles, counting and sorting activities, paper-and-pencil mazes, and games that involve matching letters and words with pictures.

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Sorts a variety of objects so that all things in the group have a single common feature (classification skill: all are food items or boats or animals).

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Infants are usually born weighing between 5 pounds 8 ounces (2,500 g) and 8 pounds 13 ounces (4,000 g), but infants born

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Adult height can be predicted from measurements of height at three years of age; males are approximately 53% of their adult height and females, 57%.

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Resting heart rate is usually between 80 and 160 beats per minute, and it typically stays within that range until the infant is about one year old.

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The hip and knee joints exhibit a greater lag than the shoulder and elbow joints, which shows that motor skills develop in a cephalocaudal trend.

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Seems fascinated by, or engrossed in, figuring out situations: where the tennis ball rolled, where the dog went, what caused a particular noise.

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Most children walk unassisted near the end of this period; falls often; not always able to maneuver around obstacles, such as furniture or toys.

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Carries a container of liquid, such as a cup of milk or bowl of water, without much spilling; pours liquid from pitcher into another container.

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Watches and imitates the play of other children, but seldom interacts directly; plays near others, often choosing similar toys and activities (

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During the first month, infants grow about 1 to 1.5 inches (2.5 to 3.8 cm) and gain weight at a rate of about 1 ounce (28 g) per day.

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Anxious to please; needs and seeks adult approval, reassurance, and praise; may complain excessively about minor hurts to gain more attention.

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Understands the sequence of daily events: "When we get up in the morning, we get dressed, have breakfast, brush our teeth, and go to school."

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and caring: comforts another child if hurt or frightened; appears to sometimes be overly affectionate in offering hugs and kisses to children

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Friendships are highly important, with friends usually of the same gender. This is not consistent to every individual, nor important overall

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Understands the concepts of "tallest", "biggest", "same", and "more"; selects the picture that has the "most houses" or the "biggest dogs".

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Throws large ball underhand without losing balance. Holds small cup or tumbler in one hand. Unbuttons large buttons; unzips large zippers.

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Receptive language is more developed than expressive language; most two-year-olds understand significantly more than they can talk about.

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Indicates a few desired objects and activities by name: "Bye-bye", "cookie"; verbal request is often accompanied by an insistent gesture.

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Knows where familiar persons should be; notes their absence; finds a hidden object by looking in last hiding place first. (This is what

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Jovanovic, B; Schwarzer, G (2017). "The influence of grasping habits and object orientation on motor planning in children and adults".

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Arm and hands are more developed than feet and legs (cephalocaudal development); hands appear large in proportion to other body parts.

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Paints and draws with purpose; may have an idea in mind, but often has problems implementing it so calls the creation something else.

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Exceedingly curious about people and surroundings; needs to be watched carefully to prevent them from getting into unsafe situations.

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Often appears selfish; not always able to take turns or to understand taking turns under some conditions; tattles on other children.

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Gains greater control over large and fine motor skills; movements are more precise and deliberate, though some clumsiness persists.

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Produces verbs with "ing" endings; uses "-s" to indicate more than one; often puts "-s" on already pluralized forms: geeses, mices.

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Attends to self-selected activities for longer periods of time. Discovering cause and effect: squeezing the cat makes them scratch.

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ball, but execute it with their left hand. The preferred hand selection of children would also be displayed in other motor tasks.

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and neurological development) although accidents should still be expected; the child will indicate readiness for toilet training.

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Many teenagers at this age are starting to drive with a learner's permit, allowing them to drive with someone else in the car.

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Posture is more erect; abdomen still large and protruding, back swayed, because abdominal muscles are not yet fully developed.

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Boasts, exaggerates, and "bends" the truth with made-up stories or claims of boldness; tests the limits with "bathroom" talk.

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Enjoys "helping" with household chores; imitates everyday activities: may try to toilet train a stuffed animal, feed a doll.

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A few children are beginning to read simple books, such as alphabet books with only a few words per page and many pictures.

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Uses furniture to lower self to floor; collapses backwards into a sitting position or falls forward on hands and then sits.

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Typically grows between 0.5 and 0.75 inches (1.3 and 1.9 cm) and gains between 1 and 1.25 pounds (450 and 570 g).

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Typically grows between 0.5 and 0.75 inches (1.3 and 1.9 cm) and gains between 1 and 1.25 pounds (450 and 570 g)

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Uses language rather than tantrums or physical aggression to express displeasure: "That's mine! Give it back, you dummy."

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Understands the concepts of smallest and shortest; places objects in order from shortest to tallest, smallest to largest.

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Ritualistic; wants everything "just so"; routines carried out exactly as before; belongings placed "where they belong".

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Newborns typically lose 7–10% of their birth weight in the first few days, but they usually regain it within two weeks.

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Talks self through steps required in simple problem-solving situations (though the "logic" may be unclear to adults).

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Participates in group play and shared activities with other children; suggests imaginative and elaborate play ideas.

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Body shape changes; takes on more adult-like appearance; still appears top-heavy; abdomen protrudes, back is swayed.

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Does not understand ethical behavior or moral standards especially when doing things that have not been given rules

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Loading parameters of the foot generally increase, the midfoot develops opposite of the other regions in the foot.

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Can have a short temper, but has learned to adjust anger levels according to the appropriateness of the situation

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Places several small items (blocks, clothespins, cereal pieces) in a container or bottle and then dumps them out.

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Can be bossy at times, telling their parents to stop talking, or telling their friends to "Come here right now."

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Answers "What are you doing?", "What is this?", and "Where?" questions dealing with familiar objects and events.

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Refers to self as "me" or sometimes "I" rather than by name: "Me go bye-bye"; has no trouble verbalizing "mine".

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Eye–hand movements better coordinated; can put objects together, take them apart; fit large pegs into pegboard.

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Walking alone leads to inconsistent steps, grasping objects for balance, and taking few steps without falling.

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The treatment in the "Language" sections in this article deals specifically with a child's acquisition of the

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Walks up and down stairs unassisted, using alternating feet; may jump from bottom step, landing on both feet.

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Walking usually occurs to explore environment and not necessarily to obtain a specific task, goal, or object.

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Passes toy to other hand when offered a second object (referred to as "crossing the midline" – an important

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Produces elaborate sentence structures: "The cat ran under the house before I could see what color it was."

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Answers appropriately when asked what to do if tired, cold, or hungry. Recites and sings simple songs and

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Ruben, K. H., Fein, G. G., & Vandenberg, B. (1983). "Play", pp. 693–744 in E. M. Hetherington (Ed.),

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Ages & stages of child development: Newborn to school age (Report). PsycEXTRA Database Record. 2006.

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Tells about objects and events not immediately present (this is both a cognitive and linguistic advance).

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Certain infantile reflexes, such as the moro reflex and asymmetrical tonic neck reflex, begin to go away.

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Pedals and steers a wheeled toy with confidence; turns corners, avoids obstacles and oncoming "traffic".

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or wheeled toy with speed and skillful steering; some children learning to ride bicycles, usually with

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Acquires and uses five to fifty words; typically these are words that refer to animals, food, and toys.

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Understands the terms dark, light, and early: "I got up early, before anyone else. It was still dark."

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Environmental conditions, weather, activity, and clothing still affect variations in body temperature.

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Typically grows between 1 and 1.5 inches (2.5 and 3.8 cm) and gains about 2 pounds (910 g).

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Understands when he or she has been thought to be "bad"; values are based on others' enforced values.

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Temper tantrums likely to peak during this year; extremely difficult to reason with during a tantrum.

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Utters three- and four-word statements; uses conventional word order to form more complete sentences.

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Manages three to four objects by setting an object aside (on lap or floor) when presented with a new

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Jim McMorran; Damian Crowther; Stew McMorran; Steve Youngmin; Ian Wacogne; Jon Pleat; Clive Prince.

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Good at memorizing and recalling information, but typically does not show a deep understanding of it

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Understands time (today, tomorrow, yesterday) and simple motion (some things go faster than others).

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Understands the concept of half; can say how many pieces an object has when it has been cut in half.

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Holds crayon or marker between first two fingers and thumb (tripod grasp), not in a fist as earlier.

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Beginning to stand alone, leaning on furniture for support; moves around obstacles by side-stepping.

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Understand more about his or her place in the world. pay more attention to friendships and teamwork.

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When looking at pictures, can recognize and identify missing puzzle parts (of person, car, animal).

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Expresses negative statements by tacking on a negative word such as "no" or "not": "Not more milk."

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Does simple classification tasks based on single dimension (separates toy dinosaurs from toy cars).

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Typically grows 1 to 1.5 inches (2.5 to 3.8 cm) and gains 1.5 to 2 pounds (680 to 910 g).

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Offers toys to other children, but is usually possessive of playthings; still tends to hoard toys.

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Has broken the linguistic code; in other words, much of a two-year-old's talk has meaning to them.

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Relates clock time to daily schedule: "Time to turn on the TV when the little hand points to 5."

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Tends to display anger physically by hitting people/objects, throwing things, or slamming doors

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Begins to use the past tense of verbs correctly: "Mommy closed the door", "Daddy went to work."

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Indicates negatives by inserting "no" or "not" before a simple noun or verb phrase: "Not baby."

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Makes relevant comments during stories, especially those that relate to home and family events.

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or companions are common; holds conversations and shares strong emotions with this invisible

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Shows improved control of crayons or markers; uses vertical, horizontal and circular strokes.

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Not as moody as 7- to 9-year-olds; overall disposition tends to be cheerful and fun-oriented

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Functioning which facilitates learning to ride a bicycle, swim, swing a bat, or kick a ball.

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Names eighteen to twenty uppercase letters. Writes several letters and sometimes their name.

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Demonstrates understanding of functional relationships (objects that belong together): Puts

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Begins to use objects for purposes other than intended (may push a block around as a boat).

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Arrives at some understanding about death and dying; expresses fear that parents may die.

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Jumps over objects 12 to 15 cm (5 to 6 in) high; lands with both feet together.

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May be increasingly fearful of the unknown like things in the dark, noises, and animals.

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Builds three-dimensional structures with small cubes by copying from a picture or model.

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May learn to turn somersaults (should be taught the right way in order to avoid injury).

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States first and last name, gender, siblings' names, and sometimes own telephone number.

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Circumference of head and chest is equal; head size is in better proportion to the body.

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Body temperature continues to fluctuate with activity, emotional state, and environment.

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Infants will begin to use visual cues while reaching and grasping after 9 months of age.

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Has fun with problem solving and sorting activities like stacking, puzzles, and mazes

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At this age, until age 7, the adult muscle activation pattern in walking is complete.

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Goes upstairs one footstep per stair step and downstairs two footsteps per stair step

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Sensitivity to pictorial depth cues (those used by artists to indicate depth) emerges

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Can see distant objects (4 to 6 m or 13 to 20 ft away) and points at them.

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Stares at objects, particularly brightly colored ones, when placed in front of face.

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Friendship with parent is less depended on but still needs closeness and nurturing.

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beginning to be replaced by permanent ones, starting with the two lower front teeth

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Demonstrates fair control of pencil or marker; may begin to color within the lines.

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Enjoys adult attention; likes to know that an adult is near; gives hugs and kisses.

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Stands alone with feet spread apart, legs stiffened, and arms extended for support.

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Between 4 and 6 years, the classic tripod grip develops and is made more efficient.

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Supinate grasping position is usually seen as the first grasping position utilized.

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Reluctant to undress in front of others and wish to have more privacy from parents

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Shows affection and caring towards others especially those "below" them or in pain

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Identifies three body parts if someone names them: "Show me your nose (toe, ear)."

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Establishes close relationships with playmates; beginning to have "best" friends.

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Produces considerable "jargon": puts words and sounds together into speech-like (

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Young toddlers (12 months) have a wider midfoot than older toddlers (24 months).

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Anterior fontanelle closing or fully closed, usually at the middle of this year.

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Stares at bright objects placed in front of the face for a short period of time.

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Answers telephone appropriately; calls person to phone or takes a brief message

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Forms shapes and objects out of clay: cookies, snakes and other simple animals.

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Likes to look at books and may pretend to "read" to others or explain pictures.

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Repeatedly picks up objects and throws them; direction becomes more deliberate.

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Responds to simple questions with "yes" or "no" and appropriate head movement.

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Uses deliberate pincer grasp to pick up small objects, toys, and finger foods.

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Leads to head control and trunk coordination while walking, by at least age 8.

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Self-perceived failure can make the child easily disappointed and frustrated.

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Reproduces many shapes and letters: square, triangle, A, I, O, U, C, H, L, T.

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Name-calling and taunting are often used as ways of excluding other children.

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Attempts to run; has difficulty stopping and usually just drops to the floor.

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Walks with adult support, holding onto adult's hand; may begin to walk alone.

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Children show significant increase in sensitivity to end-state comfort (ESC)

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Defines simple words by function: a ball is to bounce; a bed is to sleep in.

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Enjoys the companionship of other children, but does not play cooperatively.

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Serves to practice emerging visual skills. Also observed in blind children.

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Friendships highly important, may have a wide circle of both gender friends

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May persist with a particular physical activity to the point of exhaustion

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Holds onto positive beliefs involving the unexplainable (magic or fantasy)

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Starts to run easily, with knee flexion being used to support body weight.

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Balances on one foot (for a few moments), jumps up and down, but may fall.

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The child become increasingly skilled in hobbies, sports, and active play.

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Typically argumentative and unwilling to share their problems with others

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Capable of demanding motor/endurance tasks like bicycling and team sports

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Will use physical complaints as a means of getting out of undesired tasks

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Locates familiar objects on request (if child knows location of objects).

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is if infants fail to meet the development milestones in time or at all.

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reach some or most of these milestones at different times from the norm.

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Occasionally has meltdowns over minor frustrations, mainly for attention

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The dynamic tripod grip is the final stage of holding writing implements

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Tries to make mechanical objects work after watching someone else do so.

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Has a preference for sweet smells and dislikes bitter and acidic smells.

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Extremely impatient and may have a hard time waiting for special events

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Span of attention increases; works at tasks for longer periods of time.

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Plays cooperatively (can lapse), is generous, takes turns, shares toys.

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Identifies objects with specified serial position: first, second, last.

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Refers to activities, events, objects, and people that are not present.

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They adjust their grip based on touch at 8 months, not yet visual cues.

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Postural capacity needed to control balance in walking not attained yet

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Needs comfort and reassurance from adults but is less open to comfort.

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Uses gestures, such as pointing or pulling, to direct adult attention.

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Sorts objects on the basis of two dimensions, such as color and form.

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Follows two to three step directions given individually or in a group

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Needs to consume approximately 6,300 kJ (1,500 kcal) daily.

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Toddler will begin to lose the "baby fat" once he/she begins walking.

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Watches people, objects, and activities in the immediate environment.

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Cries to communicate needs and stops crying when needs have been met.

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Are still working on spelling and grammar in his or her written work.

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Begins to be able to control balance not attained at 3–4 years of age

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Be able to recognize their favourite songs, and will try to join in.

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Enthusiastic and inquisitive about surroundings and everyday events.

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Resting heart rate is generally between 70 and 190 beats per minute.

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Have well-developed speech and use correct grammar most of the time.

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Generally dependable and can be trusted with basic responsibilities

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Some children can tell time on the hour: five o'clock, two o'clock.

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Understands the concepts of less than: "Which bowl has less water?"

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May use the "-ed" ending improperly; for example: "I goed outside."

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Enjoys crayons and markers for scribbling; uses whole-arm movement.

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Has good balance when sitting; can shift positions without falling.

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Abilities to see at a distance and to track moving objects improve.

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Enjoys soft and coarse sensations and does not like rough handling.

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Begins to see parents as human beings instead of authority figures

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The number of grips conforming to ESC strongly increased with age.

4064:

Capable of concentrating and resuming a task after an interruption

2733:

The lateral toes did not show a pattern in development of walking.

2324:

Manipulates objects, transferring them from one hand to the other.

2058:

Some infantile reflexes, such as the palmar grasp reflex, go away.

6176: 6115: 6069: 5681:

Baby Milestones Slideshow: Your Child's First Year of Development

5617:"Your Baby's Growth: 7 Months (for Parents) - Nemours KidsHealth" 5322:"Your Baby's Growth: 4 Months (for Parents) - Nemours KidsHealth" 5268:"Your Baby's Growth: 3 Months (for Parents) - Nemours KidsHealth" 5162:"Your Baby's Growth: 2 Months (for Parents) - Nemours KidsHealth" 4108: 3815:

Uses appropriate verb tenses, word order, and sentence structure.

2939: 2702: 2595: 2486:

Crawls up stairs on all fours; goes down stairs in same position.

2418:

Weight is now approximately three times the child's birth weight.

2126:

Makes vowel noises, such as "ah", "eh", and "oh", while babbling.

1883: 1758: 1353: 1336: 1177: 1112: 457: 411: 374: 5044:"Your Baby's Growth: 1 Month (for Parents) - Nemours KidsHealth" 4148:

Not yet good at organizing or planning things in a practical way

3595:

with five to seven words; much longer sentences are not unusual.

2318:

Reaches with one hand leading to grasp an offered object or toy.

1927:

Uses different cries to communicate hunger, tiredness, and pain.

6110: 6081: 6023: 6018: 3977:

Exhibits a clear preference for certain subjects and activities

3809:

Able to carry on adult-like conversations; asks many questions.

3684: 3585: 3343: 2605: 2582: 2561: 2557: 2287: 2152: 1697:

Focuses on things about 8 to 12 inches (20 to 30 cm) away.

1346: 1275: 1180: 467: 369: 353: 348: 35: 5512:

Sigmundsson, Hermundur; Lorås, Håvard W; Haga, Monika (2017).

4813:"What developmental milestones is your 18-month-old reaching?" 4432:

Many teenagers at this age are starting to drive on their own.

4351:

Moody and uncomfortable with themselves and their surroundings

3740:

Recognizes seasons and major activities done at certain times.

3355:

Shows pride in accomplishments; seeks frequent adult approval.

3108:

Washes and dries hands; brushes own teeth, but not thoroughly.

2636:

When asked, will point to familiar persons, animals, and toys.

2299:"Baby fat" continues to appear on thighs, upper arms and neck. 2097:

Smiles to attract attention and responds when interacted with.

6183: 6161: 6139: 6130: 6091: 6028: 4761:"What developmental milestones is your 9-month-old reaching?" 4749:. Texas School for the Blind and Visually Impaired, tsbvi.edu 4220:

School reports may combine visual, oral, and written material

4204:

Begins to understand that not everyone holds the same beliefs

3725:

Enjoys vigorous running, jumping, climbing, and throwing etc.

3712:

Uses 6,700 to 7,100 kJ (1,600 to 1,700 kcal) a day.

3577: 3547:

Asks innumerable questions: Why? What? Where? When? How? Who?

3320: 3171:

Requires approximately 7,100 kJ (1,700 kcal) daily.

2887:

Realizes language is effective for getting desired responses.

2574: 2549: 2535: 1247: 1234:

Goes both up and down stairs using one footstep per stairstep

1067: 943:

Localises sound 45 cm (18 in) lateral to either ear

472: 416: 380: 363: 4913:"What developmental milestones is your 5-year-old reaching?" 4887:"What developmental milestones is your 3-year-old reaching?" 4839:"What developmental milestones is your 2-year-old reaching?" 4787:"What developmental milestones is your 1-year-old reaching?" 3411:

Requires approximately 7,500 kJ (1,800 kcal) daily

3223:

Becomes more accurate at hitting nails and pegs with hammer.

1711:

patterns, but prefers the human face over any other pattern.

1372:

Can execute simple gymnastic movements, such as somersaults.

1296:

Begins to be able to control gravitational forces in walking

1006:

Stands alone for a second or two, then collapses with a bump

4070:

Starts to understand right vs wrong in place of good vs bad

3793: 3749:

Recognizes some words by sight; attempts to sound out words

3581: 3531: 3251:

Likes stories about how things grow and how things operate.

3168:

Head circumference is usually not measured after age three.

2648:

Speech is 25 to 50 percent intelligible during this period.

1187: 1071: 1044: 4943:"Your Newborn's Growth (for Parents) - Nemours KidsHealth" 4236:

Friends are important, but with more arguments than before

4080:

Often displays an intense revulsion of the opposite gender

3705:

The most common vision problem during middle childhood is

3459:

Balances on either foot with good control for ten seconds.

3295:

Uses possessives consistently: "hers", "theirs", "baby's".

3199:

Runs, starts, stops, and moves around obstacles with ease.

2721:

The foot will develop greater contact area during walking.

2421:

Respiration rate varies with emotional state and activity.

1388:

Able to understand reasoning and make the right decisions.

4637:

Overview of motor, speech, vision and hearing development

3761:

Reverses or confuses certain letters: b/d, p/g, g/q, t/f.

3702:

20/20 eyesight; if below 20/40 should see a professional.

3456:

Jumps or hops forward ten times in a row without falling.

3352:

Cooperates with others; participates in group activities.

3096:

Enjoys playing with clay; pounds, rolls, and squeezes it.

2890:

Uses 50 to 300 words; vocabulary continuously increasing.

2779:

Climbs stairs unassisted (but not with alternating feet).

2528: 1311:

Fluent speech with few infantile substitutions in speech

1303:

and copies a hexagonal based pyramid using graphing paper

1093: 5806:. Early Years Matters, Bury, UK (last accessed 12 March) 5695:

Early childhood development: a multicultural perspective

4497:

Developmental differences in solitary facial expressions

3844:

Often cannot view the world from another's point of view

3812:

Learns 5 to 10 words a day; vocabulary of 10,000–14,000.

3693:

Body may appear lanky as through period of rapid growth.

3505:

Rote counts to 20 and above; many children count to 100.

3414:

Visual tracking and binocular vision are well developed.

3184:

Walks a straight line (tape or chalk line on the floor).

2730:

Force-time integral increases in all except the midfoot.

2388:

Drops thing intentionally and repeats and watches object

2014:

Able to use hands and eyes together to accomplish tasks.

902:

Adjusts hand shape to the shape of toy before picking up

781:

Sits propped up with hands, head steady for a short time

6296:

Dynamic-maturational model of attachment and adaptation

5792:. (4th Edition.) Cheltenham: Stanley Thornes Publishers 5782: 4191:

Girls typically begin breast development and growth of

4142:

Still does not display a deep understanding of subjects

4003:

Starts to develop a close circle of same-gender friends

3442:

Catches a ball thrown from 1 m (3.3 ft) away.

3276:

Counts 1 to 7 objects out loud, but not always in order

2991:

Growth is steady though slower than in first two years.

2868:", the causal relationships between actions and events. 2339:

Stacks objects; also places objects inside one another.

2305:

Both eyes work in unison (true binocular coordination).

2136:

Recognizes familiar faces and responds happily to them.

2068:

Able to roll from both front to back and back to front.

4401:

Typically gets along better with siblings than parents

3780:

Can identify right and left hands fairly consistently.

3647:

Generally subservient to parent or caregiver requests.

3427:

Walks unassisted up and down stairs, alternating feet.

3134:

Enjoys stories with riddles, guessing, and "suspense".

2705:

when things go wrong or if overly tired or frustrated.

2581:; places three geometric shapes in large formboard or 2437:

Chest circumference is larger than head circumference.

2120:

Recognizes own name and understands a few other words.

2117:

and pronounce consonants such as "ba", "da", and "ga".

5908:

Doherty, J. and Hughes, M. (2009). Chapters 6 and 7.

5790:

A practical guide to child observation and assessment

4662:"Birth to five timeline - Health tools - NHS Choices" 3883:

Capable of basic gymnastics moves such as somersaults

3690:

Heart rate and respiratory rates are close to adults.

3075:

Catches a large bounced ball with both arms extended.

3072:

Throws a ball overhand; aim and distance are limited.

2814:

Most likely in the emerging stage of learning to run.

2594:

Responds with some facial movement, but cannot truly

2354:

Creeps on hands and knees; crawls up and down stairs.

2302:

Feet appear flat as arch has not yet fully developed.

2290:

but some babies may still be waiting for their first.

259:. Please help to ensure that disputed statements are 5511: 3903:

Vocabulary now numbers at least a few thousand words

3379:

Begins to ask questions about own and others' bodies

2951:

Impatient; finds it difficult to wait or take turns.

2103:

Enjoys playing with others, especially with parents.

2081:

Uses voice to get attention and to express emotions.

1856:

Communicates and expresses more using face and body.

1828:

Starts becoming fussy when activity does not change.

4398:

May want to be independent and free of their family

4379:

Often a high interest in extracurricular activities

4230:

Often critical of others, stubborn, and egotistical

3940:

Beginning of sexual attraction to/interest in peers

3734:

Can concentrate effort but not always consistently.

3550:

Eager to learn new things. Curious and inquisitive.

3205:

Throws a ball overhand; distance and aim improving.

3010:

Posture is more erect; abdomen no longer protrudes.

2360:

The lags between joints decreases as age increases.

2278:More teeth appear, often in the order of two lower 1940:Begins to initiate social interaction by cooing or 1751:

Can hold up head and chest while in prone position.

161:. Unsourced material may be challenged and removed. 5917: 5843: 5833:. National Child Traumatic Stress Network (NCTSN). 5488:"Your Child's Development: 6 Months (for Parents)" 3937:Ability to deal with mistakes and failure improves 3925:Increased ability at problem solving and reasoning 3635:Enjoys and often has one or two focus friendships. 3105:Manipulates large buttons and zippers on clothing. 2142:Expresses happiness, pleasure, sadness, and anger. 2002:Repeats behaviors that result in a desired effect. 1408:Tends to complain, has strong emotional reactions. 841:Turns head around to sound. Follows adults' gaze ( 708:Cooes and babbles at parents and people they know 5998: 4937: 4935: 4933: 4647:. Kids Count (blog), 2012, accessed 25 March 2014 4613:Young children: Prenatal through middle childhood 4188:Extremely jumpy and has a hard time sitting still 3796:and riddles; often, the humor is far from subtle. 3333:Outgoing; friendly; overly enthusiastic at times. 3298:Answers "Whose?", "Who?", "Why?", and "How many?" 2808:Stacks four to six objects on top of one another. 2760:Brain reaches about 80 percent of its adult size. 2567:Shows or offers toy to another person to look at. 2275:Continues to use abdominal muscles for breathing. 1904:Able to shake toys and swing at dangling objects. 1402:Desires to be perfect and is quite self-critical, 1117:Walks up and down stairs using two footsteps per 917:Pulls self up to sit and sits erect with supports 6477: 5426:"Important Milestones: Your Baby By Four Months" 4435:Many teenagers at this age get their first jobs. 3656:Likes entertaining people and making them laugh. 3653:Has better self-control over swings of emotions. 3608:Speech is almost entirely grammatically correct. 3364:Enjoys role-playing and make-believe activities. 2970:Making choices is difficult; wants it both ways. 2964:); solitary play is often simple and repetitive. 2773:Can walk around obstacles and walk more erectly. 2633:Follows simple directions, "Give Daddy the cup." 2139:Startles at loud noises and may cry out of fear. 2065:, where fingers rake at objects to pick them up. 1996:Begins to easily get distracted by surroundings. 1183:, imitates hand motions and draws man on request 705:When held upright, holds head erect and steady. 5591:"Important Milestones: Your Baby By Six Months" 5242:"Important Milestones: Your Baby By Two Months" 4023: 3931:Complains a lot and has strong emotional swings 3471:Cuts on the line with scissors (not perfectly). 3382:May attempt to see others naked in the bathroom 3125:Listens attentively to age-appropriate stories. 2973:Often defiant; shouting "no" becomes automatic. 2564:and sips from cup; tries to make doll stand up. 2327:Explores new objects by poking with one finger. 2084:Enjoys taking turns making sounds with parents. 1901:Pushes on legs when feet are on a hard surface. 1629:Able to move head from side to side when prone. 1453:Show more independence from parents and family. 933:Double syllable sounds such as 'mum' and 'dada' 739:, lifts self by arms; rolls from side to back. 5788:Hobart, C. Frankel, J. and Walker, M. (2009). 5726:Social participation among pre-school children 5585: 5583: 5581: 5579: 5577: 5575: 5573: 5571: 5569: 5567: 5482: 5480: 5478: 5476: 5474: 5472: 5470: 5468: 5466: 5420: 5418: 5416: 5414: 5412: 5410: 5408: 5406: 5404: 5402: 5376: 5374: 5372: 5370: 5368: 5366: 5364: 5362: 5236: 5234: 5232: 5230: 5228: 5226: 5224: 5222: 5220: 5130: 5128: 4930: 4610: 4420:Boys typically begin to grow thick facial hair 4217:Able to use logic and debate others quite well 4145:Does not yet fully understand right from wrong 3683:Weight gains reflect significant increases in 3402:Head size is approximately that of an adult's. 3292:Uses the prepositions "on", "in", and "under". 3242:Can recognize that certain words sound similar 3217:Holds a crayon or marker using a tripod grasp. 2573:Shows increasing understanding of spatial and 2345:Beginning to pull self to a standing position. 1986:Becomes excited when approached by caregivers. 1898:Supports head and chest with arms while prone. 1825:Capable of recognizing people from a distance. 1806:Able to briefly calm self by sucking on hands. 1613:Equal movement of arms and legs on both sides. 791:Verbalizes to engage someone in an interaction 6231: 5984: 5828:"Sexual Development and Behavior in Children" 5730:The Journal of Abnormal and Social Psychology 5649: 5647: 5645: 5643: 5641: 5639: 5637: 5464: 5462: 5460: 5458: 5456: 5454: 5452: 5450: 5448: 5446: 5360: 5358: 5356: 5354: 5352: 5350: 5348: 5346: 5344: 5342: 5290: 5288: 5194: 5192: 5190: 5188: 5186: 5184: 5182: 5126: 5124: 5122: 5120: 5118: 5116: 5114: 5112: 5110: 5108: 5082: 5080: 5078: 5076: 5074: 5072: 5070: 5068: 5066: 5064: 4861: 4859: 4242:Caring about what others think is more common 4170:Gets along well with parents, eager to please 3490:Understands concept of same shape, same size. 2477:Enjoys pushing or pulling toys while walking. 2321:Adjustment from grip emerges around 8 months. 2286:followed by four more incisors and two lower 2071:Rocks back and forth and may crawl backwards. 804:Hand regard: following the hand with the eyes 618: 5013: 5011: 4512:Erikson's stages of psychosocial development 4045:and hand-eye coordination are well-developed 3850:Cannot handle things not going their own way 3752:In some cases the child may be reading well. 3193:Climbs ladders, trees, playground equipment. 1379:Uses a vocabulary of several thousand words. 914:Transfers objects from one hand to the other 788:Changes sounds while verbalizing, "eee-ahhh" 683: 5564: 5399: 5217: 5009: 5007: 5005: 5003: 5001: 4999: 4997: 4995: 4993: 4991: 4629: 4589:Seminars in child and adolescent psychiatry 4285:. Unsourced material may be challenged and 4158:Some sexual attraction to/interest in peers 3971:Wants to understand how and why things work 3573:Identifies and names four to eight colours. 3405:May begin to lose "baby" (deciduous) teeth. 3202:Uses arm movement to increase running speed 2922:65 to 70 percent of speech is intelligible. 2017:Recognizes familiar things from a distance. 1754:Movements of arms and legs become smoother. 1674:Becomes alert upon hearing pleasant sounds. 1671:Responds to parents' comforting when upset. 1405:Worries more, may have low self-confidence. 892:Able to reach hanging objects and grab them 747:Cooes (makes vowel-like noises) or babbles. 81:Learn how and when to remove these messages 27:Theoretical milestones of child development 6238: 6224: 5991: 5977: 5948:: CS1 maint: location missing publisher ( 5910:Child Development Theory and Practice 0-11 5777:Child development: an illustrated handbook 5723: 5634: 5595:Centers for Disease Control and Prevention 5443: 5430:Centers for Disease Control and Prevention 5339: 5285: 5246:Centers for Disease Control and Prevention 5179: 5105: 5061: 4917:Centers for Disease Control and Prevention 4891:Centers for Disease Control and Prevention 4856: 4843:Centers for Disease Control and Prevention 4817:Centers for Disease Control and Prevention 4791:Centers for Disease Control and Prevention 4765:Centers for Disease Control and Prevention 3990:Can start to understand how opposites work 3909:Begins to understand how sounds form words 3541:and names of upper- and lowercase letters. 3137:Speech is understandable most of the time. 2660:Enjoys rhymes and songs; tries to join in. 2266:Head and chest circumference remain equal. 2046:position and may be able to rock on knees. 1999:Begins to predict and anticipate routines. 625: 611: 5547: 5529: 4971:"Pulse: MedlinePlus Medical Encyclopedia" 4385:Has a large circle of both-gender friends 4373:Boys may begin growth of fine facial hair 4305:Learn how and when to remove this message 4006:Becomes more susceptible to peer pressure 3968:Almost able to converse at an adult level 3965:Increased physical strength and endurance 3484:Forms rectangle from two triangular cuts. 3474:Hand dominance is fairly well established 2884:Enjoys participating while being read to. 2874:Expresses more curiosity about the world. 2805:Climbs up on chair, turns, and sits down. 2802:Grasps large crayon with fist; scribbles. 2763:16 baby teeth almost finished growing out 2556:and then uses spoon as if eating; places 2407: 2394:Begins to develop expressive rather than 2235:Able to tell emotions from tone of voice. 2165:Mouths objects to understand environment. 2011:Able to reach for objects using one hand. 1566:Soothed by touches and voices of parents. 822:Prone: head held up for prolonged periods 297:Learn how and when to remove this message 279:Learn how and when to remove this message 221:Learn how and when to remove this message 4988: 4965: 4963: 4655: 4653: 4357:May believe the world is out to get them 4115:and followed by a change in facial shape 3919:Highly self-critical and eager to please 3767:Folds and cuts paper into simple shapes. 3066:Full control of feet in running movement 2861:Recognizes, expresses, and locates pain. 2811:Uses feet to propel wheeled riding toys. 2724:Maximum force of the foot will increase. 2245:Able to locate partially hidden objects. 1446:Contingent upon the health of the child. 1395:Contingent upon the health of the child. 1366:Hand-eye coordination is well developed. 667: 255:Relevant discussion may be found on the 5920:Your Child at Play: Three to Five Years 5769: 4715:Hand regard – General Practice Notebook 4543:"Child Developmental Milestones by Age" 4445:Most teens have reached sexual maturity 3618:consistently: "went", "caught", "swam." 3611:Uses "would" and "could" appropriately. 3304:Speech is almost entirely intelligible. 3226:Threads small wooden beads on a string. 3208:Builds a tower with ten or more blocks. 3093:Builds a tower of eight or more blocks. 3023:Can stand up and walk around on tiptoes 2789:during this year (depending on child's 2391:Imitates activities like playing a drum 2202:Begins to sit without support of hands. 2174:Understands where dropped objects fall. 2171:Moves in the direction they wish to go. 2100:Able to tell if a person is a stranger. 1914:Able to smile, laugh, squeal, and blow 1420:The child can tie his or her shoelaces. 14: 6478: 4606: 4604: 4439: 3487:Builds steps with set of small blocks. 3439:Learns to skip using alternative feet. 3087:Can turn pages of a book one at a time 2776:Squats for long periods while playing. 2205:Able to support entire weight on legs. 1889:Starts to reach and grasp for objects. 1262:Many infantile substitutions in speech 1017:Drops toys, and watches where they go 936:Babbles (consonant-vowel combinations) 848:Sensitivity to binocular cues emerges. 838:Follows dangling toy from side to side 778:Rests on elbows, lifts head 90 degrees 663: 6245: 6219: 5972: 5915: 5887:"Child Development Ages & Stages" 5822: 5820: 5818: 5816: 5814: 5812: 4960: 4650: 4522:Sign language in infants and toddlers 4423:Good overall relationship with family 4376:Generally pleasant, sunny disposition 4367: 4339: 4239:May be worrisome and afraid of things 3598:States the name of own city or town, 3433:Can touch toes without flexing knees. 2685:Often imitates adult actions in play. 1783:Begins to smile when interacted with. 1777:Able to coo and make gurgling noises. 1632:Head flops backward if not supported. 1626:Brings hands close to eyes and mouth. 1616:Able to briefly hold up head when in 1553:Turns head towards sounds and voices. 1385:Uses serious, logical attention span. 1382:Demonstrates a longer attention span. 1271:Dresses and undresses with assistance 926:of cube hand to hand eye coordination 752:Focuses on objects as well as adults 5956: 5655:"Developmental Milestones: 7 Months" 5296:"Developmental Milestones: 3 Months" 4706: 4704: 4684:"When Do Babies Start Rolling Over?" 4672:from the original on 22 August 2009. 4414: 4389: 4354:Likes to be alone and values privacy 4283:adding citations to reliable sources 4250: 4173:Has fewer fears than at younger ages 3659:Enjoys conversing with other people. 3567:while looking at pictures in a book. 3534:; beginning to count and save money. 3042:Can momentarily balance on one foot. 2727:Peak pressure of the foot increases. 2260:Respiration rates vary with activity 1661:Able to recognize voices of parents. 1140:Able to repeat words that they hear. 232: 159:adding citations to reliable sources 130: 87: 46: 6439:Attachment-based therapy (children) 5136:"Developmental Milestones: 1 Month" 4910: 4884: 4836: 4810: 4784: 4758: 4659: 4601: 4317: 3770:Can tie laces, string (like shoes). 3386: 3214:Reproduces some shapes and letters. 2577:discrimination: puts all pegs in a 2181: 2145:Responds to the emotions of others. 2123:Makes sounds in response to sounds. 1895:Able to control head while sitting. 1832: 1651:Able to make noises besides crying. 1582:Follows faces when quiet and alert. 1436:Become interested in reading books. 1423:The child can draw a diamond shape. 1192:Pronate method of grasping develops 1050:Picks up a toy without falling over 725:Recognition of familiar individuals 24: 6449:Dyadic developmental psychotherapy 5902: 5809: 4454:Romantic interests are more common 4363:May not get along well with adults 4322: 4201:Better ability at making decisions 4177: 2847:, which usually occurs during the 2630:): "More cookie", "Daddy bye-bye." 2504:Stacks two to six objects per day. 2402: 2296:Legs may continue to appear bowed. 2005:Grasps, mouths, and looks at toys. 1921:Coos in response to parents' coos. 1892:Brings hands and objects to mouth. 1860: 1786:Pays attention to speaking people. 1720:Recognizes scent of mother's milk. 1081:'Jargon': Many intelligible words 855:Squeals with delight appropriately 640:are the theoretical milestones of 25: 6502: 4701: 4565:"Developmental Milestones by Age" 4382:May want to please and be popular 3951: 3863: 3508:Recognizes numerals from 1 to 10. 3408:Body is adult-like in proportion. 3099:May begin to show hand dominance. 3045:Can kick big ball-shaped objects. 2980: 2799:Opens doors by turning doorknobs. 2754:Respirations are slow and regular 2492:Carries toys from place to place. 2021: 1780:Able to turn head towards noises. 1727: 1332:Mechanical energy transfer exists 1143:Gradually build their vocabulary. 858:Discriminates smile. Smiles often 658:pervasive developmental disorders 62:This article has multiple issues. 4404:Friendships are highly important 4330: 4255: 4225:Social and emotional development 4028: 3391: 3157: 3048:Needs minimal assistance eating. 2676:Helps pick up and put away toys. 2514:Enjoys object-hiding activities. 2008:Lets caregivers know about mood. 1589: 1456:Start to think about the future. 794:Blows bubbles, plays with tongue 644:, some of which are asserted in 592: 332: 237: 135: 92: 51: 5837: 5795: 5748: 5717: 5700: 5687: 5673: 5609: 5505: 5314: 5260: 5154: 5036: 4904: 4878: 4830: 4804: 4778: 4752: 4345:Menstruation in girls is common 4093: 3672: 3560:Vocabulary of 1,500 words plus. 2853:theory of cognitive development 2740: 2168:Reaches for everything in view. 1947:Smiles spontaneously at people. 1569:Able to self-soothe when upset. 146:needs additional citations for 70:or discuss these issues on the 6444:Attachment-based psychotherapy 4731: 4676: 4582: 4557: 4535: 4407:Romantic interests are common. 4246: 3974:Clear, logical thinking skills 3922:Can understand right and wrong 2682:Enjoys being held and read to. 2249: 1757:Can hold head steady while in 1635:Infantile reflexes are strong. 1532:asymmetrical tonic neck reflex 879:Goes for objects and gets them 13: 1: 6301:Fathers as attachment figures 6000:Development of the human body 5713:10.1016/S0966-6362(03)00064-X 5697:. (6th Edition) USA: Pearson. 4528: 4457:Love interests can be intense 4207:Early acne is common in girls 3662:Boasts about accomplishments. 3424:Walks backwards, toe to heel. 3007:" disappears as neck appears. 2385:Recognizes objects in reverse 2055:Passes objects between hands. 1973:Smiles in response to events. 1767:Able to open and close hands. 1572:Is alert for periods of time. 1506:Moves in response to stimuli. 1063:Begins to jump with both feet 993:Apprehensive about strangers 920:Rolls over from tummy to back 117:and discuss the issue on the 6465:History of attachment theory 6352:Patricia McKinsey Crittenden 6321:Reactive attachment disorder 5889:. Child Care Resource Center 5756:Handbook of child psychology 5684:at webMD. Retrieved May 2013 4195:; usually no puberty in boys 4048:Capable of drawing in detail 4039:Quite good at handling tools 4024:Preteen/late childhood years 3090:Enjoys building with blocks. 2570:Names many everyday objects. 2440:Legs may still appear bowed. 1316:Dresses and undresses alone 1290:Skips on both feet and hops. 1070:of 3 or 4 cubes and throw a 536:Developmental stage theories 397:Emerging and early adulthood 7: 5959:How to Accompany Your Child 5846:Developmental Psychobiology 4461: 4360:Insecure about their bodies 3078:Enjoys swinging on a swing. 3057:Bends over without falling. 2997:Legs grow faster than arms. 2925:Is able to verbalize needs. 2408:Toddler (12–24 months) 1950:Enjoys playing with others. 1714:Hearing is fully developed. 1031:Understands simple commands 10: 6507: 3728:Has trouble staying still. 3530:Recognizes and identifies 3264:Rote counts to 20 or more. 3258:, creating silly language. 3111:Usually achieves complete 2691:Recognizes self in mirror. 2608:are diagnosed at this age. 2215:Able to see in full color. 1822:Follows objects with eyes. 1700:Eyes wander and may cross. 1610:Hands kept in tight fists. 1472: 1467: 1089:Demands constant mothering 882:Objects taken to the mouth 757:Loves looking at new faces 719:Starts to smile at parents 716:Loves looking at new faces 482:Development and psychology 170:"Child development stages" 39: 29: 6457: 6431: 6405: 6329: 6253: 6192: 6100: 6042: 6006: 5779:. Oxon: Hodder Education. 4517:Infant visual development 4507:Early childhood education 4118:Adult-like motor planning 4089:Prone to wide mood swings 2501:Helps turn pages in book. 2151:Likes to look at self in 2049:Able to sit with support. 1796:Tries to look at parents. 1259:Questioning at its height 1217:Undresses with assistance 722:Startled by sudden noises 5693:Trawick-Smith, J (2013) 5531:10.3389/fpsyg.2017.00657 3928:Can feel shame and guilt 3831:Has mood swings towards 3069:Pedals a small tricycle. 3026:"Baby" teeth stage over. 2928:Asks a lot of questions. 2177:Looks at nearby objects. 2148:Often seems to be happy. 1853:Develops a social smile. 1819:Pays attention to faces. 1243:Imitates gate with cubes 1014:2 or 3 words repeatedly 1003:Stands holding furniture 864:Reaches out for objects. 861:Laughs at simple things. 807:Color vision adult-like. 775:Rolls from tummy to side 679:Developmental milestones 638:Child development stages 561:Psychosexual development 6316:Object relations theory 5916:Segal, Marilyn (1998). 5518:Frontiers in Psychology 4611:Berk, Laura E. (2012). 4009:Enjoys group activities 3962:Has good finger control 3906:Capable of telling time 3799:In some cases, may use 3537:Many children know the 3273:Very good storytellers. 2858:Names familiar objects. 2673:Less wary of strangers. 2459:skillfully and quickly. 1963:Begins to mimic sounds. 1162:Daytime bladder control 1150:Able to recognize words 1123:Builds tower of 6 cubes 1099:Feeds self with a spoon 990:Looks for toys dropped 18:Developmental timetable 6271:Attachment in children 4911:CDC (10 August 2021). 4872:10.1037/e423492008-001 4811:CDC (11 August 2021). 4785:CDC (11 August 2021). 4759:CDC (11 August 2021). 4469:Attachment in children 3764:Able to trace objects. 3020:Can jump from low step 2851:of Piaget's childhood 2489:Sits in a small chair. 2061:Grabs objects using a 1937:Responds to affection. 1623:Arm thrusts are jerky. 979:Picks up objects with 674: 6432:Clinical applications 6281:Attachment and health 5957:Ward, Lauren (2018). 4615:. Allyn & Bacon. 4107:Some girls may begin 4067:Eager to learn skills 3993:Can now speak clearly 3880:Good sense of balance 3876:hand-eye coordination 3758:Enjoys making things. 3709:, or nearsightedness. 3602:, and parents' names. 3584:; makes up jokes and 3436:Walks a balance beam. 3120:Cognitive development 2509:Cognitive development 2465:Gets to feet unaided. 2424:Rate of growth slows. 2131:Emotional development 2042:Able to push up to a 1968:Emotional development 1924:Turns towards voices. 1801:Emotional development 1687:Able to follow faces. 1666:Emotional development 1561:Emotional development 671: 599:Psychology portal 501:Nature versus nurture 425:Biological milestones 107:does not represent a 6413:Attachment parenting 6311:Maternal deprivation 6266:Attachment in adults 5924:. New York. p. 5724:Parten, M. (1932). " 4885:CDC (27 July 2021). 4837:CDC (27 July 2021). 4643:4 March 2016 at the 4553:on 27 December 2017. 4279:improve this section 3998:Social and emotional 3914:Social and emotional 3835:depending on the day 3820:Social and emotional 3555:Language development 3163:Physical development 3060:Climbs objects well. 3054:Can walk unassisted. 2933:Social and emotional 2223:Language development 2187:Physical development 2108:Language development 2076:Communication skills 2027:Physical development 1983:Able to soothe self. 1955:Language development 1909:Communication skills 1866:Physical development 1838:Physical development 1772:Communication skills 1733:Physical development 1640:Communication skills 1595:Physical development 1548:Communication skills 1478:Physical development 1221:Imaginary companions 770:2.1–2.5 months 711:Focuses on parents. 656:One way to identify 453:Language acquisition 248:factual accuracy is 155:improve this article 115:improve this article 42:Prenatal development 6286:Attachment measures 6276:Attachment disorder 5775:Harding, J. (2013) 5659:healthychildren.org 5300:healthychildren.org 5140:healthychildren.org 4745:29 May 2014 at the 4440:Seventeen years old 3614:Uses past tense of 3340:Imaginary playmates 3229:Can run in a circle 3144:: "big, brown dog". 2713:Walking development 2604:Most children with 2270:Anterior fontanelle 2210:Sensory development 2094:Is socially active. 1886:from front to back. 1692:Sensory development 1539:palmar grasp reflex 1205:Speaks in sentences 833:Makes vowel noises 694:Vision and hearing 681: 664:Table of milestones 576:Cultural-historical 6418:Attachment therapy 6397:Nikolaas Tinbergen 6155:Emerging adulthood 5961:. Newmarket Press. 4719:. Gpnotebook.co.uk 4490:The Connected Baby 4449:Sexual intercourse 4368:Fourteen years old 4340:Thirteen years old 4198:Rapid height gains 4113:breast development 3630:Social development 3328:Social development 3140:Produces expanded 3051:Jumps on the spot. 2908:Uses some plurals. 2849:sensorimotor stage 2628:telegraphic speech 2541:Enjoys looking at 2396:receptive language 2089:Social development 1978:facial expressions 1976:Begins to imitate 1932:Social development 1848:Social development 1809:Smiles when happy. 1791:Social development 1656:Social development 1511:infantile reflexes 1186:Builds tower of 9 987:Babbles tunefully 949:adult-like (20/20) 887:Enjoys vocal play 732:1.6–2 months 702:1–1.5 months 677: 675: 491:Pre- and perinatal 6486:Child development 6473: 6472: 6330:Notable theorists 6291:Attachment theory 6247:Attachment theory 6213: 6212: 6077:Adult development 6055:Child development 5912:. Essex: Pearson. 5858:10.1002/dev.21573 5803:Child development 4739:Early Development 4484:Child development 4474:Attachment theory 4415:Sixteen years old 4390:Fifteen years old 4315: 4314: 4307: 4016:and melodramatics 3957:Motor development 3869:Motor development 3833:primary caregiver 3717:Motor development 3563:Tells a familiar 3419:Motor development 3187:Hops on one foot. 3179:Motor development 3115:during this time. 3034:Motor development 2864:Expected to use " 2845:object permanence 2768:Motor development 2599:facial expression 2451:Motor development 2313:Motor development 2197:Motor development 2037:Motor development 1960:Starts to babble. 1877:Motor development 1746:Motor development 1605:Motor development 1509:Displays several 1501:Motor development 1487:often weigh less. 1465: 1464: 1369:Has good balance. 1240:Skips on one foot 965:9–10 months 876:Holds head steady 797:Deep belly laughs 763:Starting to smile 642:child development 635: 634: 307: 306: 299: 289: 288: 281: 231: 230: 223: 205: 129: 128: 85: 16:(Redirected from 6498: 6423:Candace Newmaker 6342:William E. Blatz 6261:Affectional bond 6240: 6233: 6226: 6217: 6216: 6193:Social and legal 5993: 5986: 5979: 5970: 5969: 5962: 5953: 5947: 5939: 5923: 5898: 5896: 5894: 5878: 5877: 5841: 5835: 5834: 5832: 5824: 5807: 5799: 5793: 5786: 5780: 5773: 5767: 5752: 5746: 5745: 5742:10.1037/h0074524 5721: 5715: 5704: 5698: 5691: 5685: 5677: 5671: 5670: 5668: 5666: 5651: 5632: 5631: 5629: 5627: 5613: 5607: 5606: 5604: 5602: 5597:. 11 August 2021 5587: 5562: 5561: 5551: 5533: 5509: 5503: 5502: 5500: 5498: 5484: 5441: 5440: 5438: 5436: 5422: 5397: 5396: 5394: 5392: 5378: 5337: 5336: 5334: 5332: 5318: 5312: 5311: 5309: 5307: 5292: 5283: 5282: 5280: 5278: 5264: 5258: 5257: 5255: 5253: 5248:. 11 August 2021 5238: 5215: 5214: 5212: 5210: 5196: 5177: 5176: 5174: 5172: 5158: 5152: 5151: 5149: 5147: 5132: 5103: 5102: 5100: 5098: 5084: 5059: 5058: 5056: 5054: 5040: 5034: 5033: 5031: 5029: 5015: 4986: 4985: 4983: 4981: 4967: 4958: 4957: 4955: 4953: 4939: 4928: 4927: 4925: 4923: 4908: 4902: 4901: 4899: 4897: 4882: 4876: 4875: 4863: 4854: 4853: 4851: 4849: 4834: 4828: 4827: 4825: 4823: 4808: 4802: 4801: 4799: 4797: 4782: 4776: 4775: 4773: 4771: 4756: 4750: 4735: 4729: 4728: 4726: 4724: 4708: 4699: 4698: 4696: 4694: 4680: 4674: 4673: 4657: 4648: 4633: 4627: 4626: 4608: 4599: 4586: 4580: 4579: 4577: 4575: 4561: 4555: 4554: 4549:. Archived from 4539: 4318:Twelve years old 4310: 4303: 4299: 4296: 4290: 4259: 4251: 4111:, starting with 4043:Manual dexterity 3667:imaginary friend 3621:Uses past-tense 3387:Middle childhood 2866:magical thinking 2272:begins to close. 2250:8–12 months 2240:Cognitive skills 2182:Seven months old 2160:Cognitive skills 2115:blow raspberries 1991:Cognitive skills 1833:Three months old 1814:Cognitive skills 1679:Cognitive skills 1577:Cognitive skills 1214:Cooperative play 1199:Constantly asks 1022:Cooperates with 976:Sits unsupported 959:stranger anxiety 760:Smiles at parent 682: 676: 627: 620: 613: 597: 596: 595: 496:Infant and child 336: 311: 310: 302: 295: 284: 277: 273: 270: 264: 261:reliably sourced 241: 240: 233: 226: 219: 215: 212: 206: 204: 163: 139: 131: 103:English language 96: 88: 77: 55: 54: 47: 21: 6506: 6505: 6501: 6500: 6499: 6497: 6496: 6495: 6476: 6475: 6474: 6469: 6453: 6427: 6401: 6325: 6249: 6244: 6214: 6209: 6205:Age of majority 6188: 6121:Early childhood 6096: 6043:Birth and after 6038: 6034:Gestational age 6002: 5997: 5966: 5941: 5940: 5936: 5905: 5903:Further reading 5892: 5890: 5885: 5882: 5881: 5842: 5838: 5830: 5826: 5825: 5810: 5800: 5796: 5787: 5783: 5774: 5770: 5753: 5749: 5722: 5718: 5705: 5701: 5692: 5688: 5678: 5674: 5664: 5662: 5653: 5652: 5635: 5625: 5623: 5615: 5614: 5610: 5600: 5598: 5589: 5588: 5565: 5510: 5506: 5496: 5494: 5486: 5485: 5444: 5434: 5432: 5424: 5423: 5400: 5390: 5388: 5380: 5379: 5340: 5330: 5328: 5320: 5319: 5315: 5305: 5303: 5294: 5293: 5286: 5276: 5274: 5266: 5265: 5261: 5251: 5249: 5240: 5239: 5218: 5208: 5206: 5198: 5197: 5180: 5170: 5168: 5160: 5159: 5155: 5145: 5143: 5134: 5133: 5106: 5096: 5094: 5086: 5085: 5062: 5052: 5050: 5042: 5041: 5037: 5027: 5025: 5017: 5016: 4989: 4979: 4977: 4975:medlineplus.gov 4969: 4968: 4961: 4951: 4949: 4941: 4940: 4931: 4921: 4919: 4909: 4905: 4895: 4893: 4883: 4879: 4865: 4864: 4857: 4847: 4845: 4835: 4831: 4821: 4819: 4809: 4805: 4795: 4793: 4783: 4779: 4769: 4767: 4757: 4753: 4747:Wayback Machine 4736: 4732: 4722: 4720: 4709: 4702: 4692: 4690: 4682: 4681: 4677: 4658: 4651: 4645:Wayback Machine 4634: 4630: 4623: 4609: 4602: 4587: 4583: 4573: 4571: 4563: 4562: 4558: 4541: 4540: 4536: 4531: 4526: 4502:Early childhood 4479:Behavioral cusp 4464: 4442: 4417: 4392: 4370: 4342: 4333: 4325: 4323:Language skills 4320: 4311: 4300: 4294: 4291: 4276: 4260: 4249: 4212:Language skills 4180: 4178:Eleven-year-old 4137:Language skills 4096: 4056:Language skills 4031: 4026: 3982:Language skills 3954: 3874:Well-developed 3866: 3675: 3616:irregular verbs 3576:Recognizes the 3451:training wheels 3394: 3389: 3160: 3113:bladder control 2983: 2938:Shows signs of 2787:toilet training 2785:Often achieves 2743: 2410: 2405: 2403:Early childhood 2282:then two upper 2252: 2184: 2024: 1882:May be able to 1863: 1861:Four months old 1835: 1730: 1705:black and white 1648:at loud noises. 1592: 1475: 1470: 1343:right from left 1274:Attends to own 1096:with both hands 1038:18 months 895:Noticing colors 843:joint attention 666: 631: 593: 591: 538: 393: 377: 366: 326:and development 325: 303: 292: 291: 290: 285: 274: 268: 265: 254: 246:This article's 242: 238: 227: 216: 210: 207: 164: 162: 152: 140: 125: 97: 56: 52: 45: 38: 28: 23: 22: 15: 12: 11: 5: 6504: 6494: 6493: 6488: 6471: 6470: 6468: 6467: 6461: 6459: 6455: 6454: 6452: 6451: 6446: 6441: 6435: 6433: 6429: 6428: 6426: 6425: 6420: 6415: 6409: 6407: 6403: 6402: 6400: 6399: 6394: 6389: 6384: 6379: 6374: 6369: 6364: 6359: 6354: 6349: 6344: 6339: 6337:Mary Ainsworth 6333: 6331: 6327: 6326: 6324: 6323: 6318: 6313: 6308: 6303: 6298: 6293: 6288: 6283: 6278: 6273: 6268: 6263: 6257: 6255: 6251: 6250: 6243: 6242: 6235: 6228: 6220: 6211: 6210: 6208: 6207: 6202: 6196: 6194: 6190: 6189: 6187: 6186: 6181: 6180: 6179: 6174: 6169: 6159: 6158: 6157: 6152: 6147: 6145:Preadolescence 6137: 6136: 6135: 6134: 6133: 6123: 6118: 6113: 6104: 6102: 6098: 6097: 6095: 6094: 6089: 6084: 6079: 6074: 6073: 6072: 6067: 6062: 6052: 6046: 6044: 6040: 6039: 6037: 6036: 6031: 6026: 6021: 6016: 6010: 6008: 6004: 6003: 5996: 5995: 5988: 5981: 5973: 5964: 5963: 5954: 5934: 5913: 5904: 5901: 5900: 5899: 5880: 5879: 5852:(8): 949–957. 5836: 5808: 5794: 5781: 5768: 5747: 5736:(3): 243–269. 5716: 5699: 5686: 5672: 5633: 5621:kidshealth.org 5608: 5563: 5504: 5492:kidshealth.org 5442: 5398: 5386:kidshealth.org 5338: 5326:kidshealth.org 5313: 5284: 5272:kidshealth.org 5259: 5216: 5204:kidshealth.org 5178: 5166:kidshealth.org 5153: 5104: 5092:kidshealth.org 5060: 5048:kidshealth.org 5035: 5023:kidshealth.org 4987: 4959: 4947:KidsHealth.org 4929: 4903: 4877: 4855: 4829: 4803: 4777: 4751: 4730: 4700: 4675: 4660:Choices, NHS. 4649: 4628: 4622:978-0205011094 4621: 4600: 4581: 4556: 4533: 4532: 4530: 4527: 4525: 4524: 4519: 4514: 4509: 4504: 4499: 4494: 4486: 4481: 4476: 4471: 4465: 4463: 4460: 4459: 4458: 4455: 4452: 4451:is more common 4446: 4441: 4438: 4437: 4436: 4433: 4430: 4427: 4424: 4421: 4416: 4413: 4412: 4411: 4408: 4405: 4402: 4399: 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2499: 2496: 2493: 2490: 2487: 2484: 2481: 2478: 2475: 2472: 2469: 2466: 2463: 2460: 2448: 2447: 2444: 2441: 2438: 2435: 2432: 2425: 2422: 2419: 2409: 2406: 2404: 2401: 2400: 2399: 2392: 2389: 2386: 2383: 2376: 2373: 2370: 2367: 2364: 2361: 2358: 2355: 2352: 2349: 2346: 2343: 2340: 2337: 2334: 2331: 2328: 2325: 2322: 2319: 2310: 2309: 2306: 2303: 2300: 2297: 2294: 2291: 2276: 2273: 2267: 2264: 2261: 2251: 2248: 2247: 2246: 2237: 2236: 2233: 2220: 2219: 2216: 2207: 2206: 2203: 2194: 2193: 2183: 2180: 2179: 2178: 2175: 2172: 2169: 2166: 2157: 2156: 2149: 2146: 2143: 2140: 2137: 2128: 2127: 2124: 2121: 2118: 2105: 2104: 2101: 2098: 2095: 2086: 2085: 2082: 2073: 2072: 2069: 2066: 2059: 2056: 2053: 2050: 2047: 2034: 2033: 2023: 2022:Six months old 2020: 2019: 2018: 2015: 2012: 2009: 2006: 2003: 2000: 1997: 1988: 1987: 1984: 1981: 1974: 1965: 1964: 1961: 1952: 1951: 1948: 1945: 1938: 1929: 1928: 1925: 1922: 1919: 1906: 1905: 1902: 1899: 1896: 1893: 1890: 1887: 1874: 1873: 1862: 1859: 1858: 1857: 1854: 1845: 1844: 1834: 1831: 1830: 1829: 1826: 1823: 1820: 1811: 1810: 1807: 1798: 1797: 1788: 1787: 1784: 1781: 1778: 1769: 1768: 1765: 1762: 1755: 1752: 1743: 1742: 1739: 1729: 1728:Two months old 1726: 1725: 1724: 1721: 1718: 1715: 1712: 1701: 1698: 1689: 1688: 1685: 1676: 1675: 1672: 1663: 1662: 1653: 1652: 1649: 1637: 1636: 1633: 1630: 1627: 1624: 1621: 1618:prone position 1614: 1611: 1602: 1601: 1591: 1588: 1587: 1586: 1583: 1574: 1573: 1570: 1567: 1558: 1557: 1554: 1545: 1544: 1543: 1542: 1535: 1528: 1521: 1518:rooting reflex 1507: 1498: 1497: 1494: 1491: 1488: 1474: 1471: 1469: 1466: 1463: 1462: 1461: 1460: 1457: 1454: 1449: 1448: 1447: 1442: 1441: 1440: 1437: 1434: 1429: 1428: 1427: 1424: 1421: 1416: 1412: 1411: 1410: 1409: 1406: 1403: 1398: 1397: 1396: 1391: 1390: 1389: 1386: 1383: 1380: 1375: 1374: 1373: 1370: 1367: 1362: 1358: 1357: 1351: 1350: 1349: 1345:and number of 1339: 1333: 1330: 1327: 1322: 1318: 1317: 1314: 1312: 1309: 1308: 1307: 1304: 1297: 1294: 1291: 1286: 1282: 1281: 1280: 1279: 1272: 1267: 1265: 1264: 1263: 1260: 1255: 1254: 1253: 1250: 1244: 1241: 1238: 1235: 1230: 1226: 1225: 1224: 1223: 1218: 1215: 1210: 1208: 1207: 1206: 1203: 1195: 1194: 1193: 1190: 1184: 1175: 1170: 1166: 1165: 1164: 1163: 1160: 1153: 1152: 1151: 1146: 1145: 1144: 1141: 1138: 1126: 1125: 1124: 1121: 1115: 1107: 1103: 1102: 1101: 1100: 1097: 1092:Drinks from a 1090: 1085: 1082: 1079: 1078: 1077: 1074: 1064: 1061: 1051: 1048: 1039: 1035: 1034: 1033: 1032: 1029: 1026: 1018: 1015: 1009: 1008: 1007: 1004: 999: 995: 994: 991: 988: 985: 984: 983: 977: 974: 966: 962: 961: 955: 954: 953: 950: 944: 939: 938: 937: 934: 929: 928: 927: 921: 918: 915: 910: 909:6 months 906: 905: 904: 903: 898: 897: 896: 893: 888: 885: 884: 883: 880: 877: 872: 871:5 months 868: 867: 866: 865: 862: 859: 856: 851: 850: 849: 846: 839: 834: 831: 830: 829: 823: 818: 817:3 months 814: 813: 810: 809: 808: 805: 800: 799: 798: 795: 792: 789: 784: 783: 782: 779: 776: 771: 767: 766: 765: 764: 761: 758: 753: 750: 749: 748: 745: 740: 733: 729: 728: 727: 726: 723: 720: 717: 712: 709: 706: 703: 699: 698: 695: 692: 689: 686: 665: 662: 633: 632: 630: 629: 622: 615: 607: 604: 603: 602: 601: 586: 585: 584: 583: 578: 573: 568: 563: 558: 553: 548: 540: 539: 534: 531: 530: 529: 528: 523: 518: 513: 508: 503: 498: 493: 485: 484: 478: 477: 476: 475: 470: 465: 460: 455: 450: 445: 440: 435: 427: 426: 422: 421: 420: 419: 414: 409: 404: 399: 394: 388: 383: 378: 372: 367: 361: 356: 351: 343: 342: 338: 337: 329: 328: 320: 319: 305: 304: 287: 286: 269:September 2022 245: 243: 236: 229: 228: 143: 141: 134: 127: 126: 111:of the subject 109:worldwide view 100: 98: 91: 86: 60: 59: 57: 50: 26: 9: 6: 4: 3: 2: 6503: 6492: 6491:Medical lists 6489: 6487: 6484: 6483: 6481: 6466: 6463: 6462: 6460: 6456: 6450: 6447: 6445: 6442: 6440: 6437: 6436: 6434: 6430: 6424: 6421: 6419: 6416: 6414: 6411: 6410: 6408: 6404: 6398: 6395: 6393: 6390: 6388: 6385: 6383: 6382:Konrad Lorenz 6380: 6378: 6377:Melanie Klein 6375: 6373: 6370: 6368: 6365: 6363: 6362:Sigmund Freud 6360: 6358: 6355: 6353: 6350: 6348: 6345: 6343: 6340: 6338: 6335: 6334: 6332: 6328: 6322: 6319: 6317: 6314: 6312: 6309: 6307: 6306:Human bonding 6304: 6302: 6299: 6297: 6294: 6292: 6289: 6287: 6284: 6282: 6279: 6277: 6274: 6272: 6269: 6267: 6264: 6262: 6259: 6258: 6256: 6252: 6248: 6241: 6236: 6234: 6229: 6227: 6222: 6221: 6218: 6206: 6203: 6201: 6198: 6197: 6195: 6191: 6185: 6182: 6178: 6175: 6173: 6170: 6168: 6165: 6164: 6163: 6160: 6156: 6153: 6151: 6148: 6146: 6143: 6142: 6141: 6138: 6132: 6129: 6128: 6127: 6124: 6122: 6119: 6117: 6114: 6112: 6109: 6108: 6106: 6105: 6103: 6099: 6093: 6090: 6088: 6085: 6083: 6080: 6078: 6075: 6071: 6068: 6066: 6063: 6061: 6058: 6057: 6056: 6053: 6051: 6048: 6047: 6045: 6041: 6035: 6032: 6030: 6027: 6025: 6022: 6020: 6017: 6015: 6012: 6011: 6009: 6005: 6001: 5994: 5989: 5987: 5982: 5980: 5975: 5974: 5971: 5967: 5960: 5955: 5951: 5945: 5937: 5935:1-55704-337-X 5931: 5927: 5922: 5921: 5914: 5911: 5907: 5906: 5888: 5884: 5883: 5875: 5871: 5867: 5863: 5859: 5855: 5851: 5847: 5840: 5829: 5823: 5821: 5819: 5817: 5815: 5813: 5805: 5804: 5798: 5791: 5785: 5778: 5772: 5765: 5761: 5757: 5751: 5743: 5739: 5735: 5731: 5727: 5720: 5714: 5710: 5703: 5696: 5690: 5683: 5682: 5676: 5661:. 7 June 2009 5660: 5656: 5650: 5648: 5646: 5644: 5642: 5640: 5638: 5622: 5618: 5612: 5596: 5592: 5586: 5584: 5582: 5580: 5578: 5576: 5574: 5572: 5570: 5568: 5559: 5555: 5550: 5545: 5541: 5537: 5532: 5527: 5523: 5519: 5515: 5508: 5493: 5489: 5483: 5481: 5479: 5477: 5475: 5473: 5471: 5469: 5467: 5465: 5463: 5461: 5459: 5457: 5455: 5453: 5451: 5449: 5447: 5431: 5427: 5421: 5419: 5417: 5415: 5413: 5411: 5409: 5407: 5405: 5403: 5387: 5383: 5377: 5375: 5373: 5371: 5369: 5367: 5365: 5363: 5361: 5359: 5357: 5355: 5353: 5351: 5349: 5347: 5345: 5343: 5327: 5323: 5317: 5302:. 1 June 2009 5301: 5297: 5291: 5289: 5273: 5269: 5263: 5247: 5243: 5237: 5235: 5233: 5231: 5229: 5227: 5225: 5223: 5221: 5205: 5201: 5195: 5193: 5191: 5189: 5187: 5185: 5183: 5167: 5163: 5157: 5142:. 1 June 2009 5141: 5137: 5131: 5129: 5127: 5125: 5123: 5121: 5119: 5117: 5115: 5113: 5111: 5109: 5093: 5089: 5083: 5081: 5079: 5077: 5075: 5073: 5071: 5069: 5067: 5065: 5049: 5045: 5039: 5024: 5020: 5014: 5012: 5010: 5008: 5006: 5004: 5002: 5000: 4998: 4996: 4994: 4992: 4976: 4972: 4966: 4964: 4948: 4944: 4938: 4936: 4934: 4918: 4914: 4907: 4892: 4888: 4881: 4873: 4869: 4862: 4860: 4844: 4840: 4833: 4818: 4814: 4807: 4792: 4788: 4781: 4766: 4762: 4755: 4748: 4744: 4741: 4740: 4734: 4718: 4716: 4707: 4705: 4689: 4685: 4679: 4671: 4667: 4663: 4656: 4654: 4646: 4642: 4639: 4638: 4632: 4624: 4618: 4614: 4607: 4605: 4598: 4597:1-904671-13-6 4594: 4590: 4585: 4570: 4569:Autism Speaks 4566: 4560: 4552: 4548: 4547:Gold Learners 4544: 4538: 4534: 4523: 4520: 4518: 4515: 4513: 4510: 4508: 4505: 4503: 4500: 4498: 4495: 4493:(documentary) 4492: 4491: 4487: 4485: 4482: 4480: 4477: 4475: 4472: 4470: 4467: 4466: 4456: 4453: 4450: 4447: 4444: 4443: 4434: 4431: 4428: 4425: 4422: 4419: 4418: 4409: 4406: 4403: 4400: 4397: 4394: 4393: 4384: 4381: 4378: 4375: 4372: 4371: 4362: 4359: 4356: 4353: 4350: 4347: 4344: 4343: 4337: 4331:Social skills 4328: 4309: 4306: 4298: 4288: 4284: 4280: 4274: 4273: 4269: 4264:This section 4262: 4258: 4253: 4252: 4241: 4238: 4235: 4232: 4229: 4228: 4227: 4226: 4219: 4216: 4215: 4214: 4213: 4206: 4203: 4200: 4197: 4194: 4190: 4187: 4186: 4185: 4184: 4172: 4169: 4166: 4163: 4160: 4157: 4156: 4155: 4154: 4153:Social skills 4147: 4144: 4141: 4140: 4139: 4138: 4131: 4127: 4124: 4120: 4117: 4114: 4110: 4106: 4103: 4102: 4101: 4100: 4088: 4085: 4082: 4079: 4078: 4077: 4076: 4075:Social skills 4069: 4066: 4063: 4060: 4059: 4058: 4057: 4050: 4047: 4044: 4041: 4038: 4037: 4036: 4035: 4029:Nine-year-old 4018: 4015: 4011: 4008: 4005: 4002: 4001: 4000: 3999: 3992: 3989: 3986: 3985: 3984: 3983: 3976: 3973: 3970: 3967: 3964: 3961: 3960: 3959: 3958: 3946: 3942: 3939: 3936: 3933: 3930: 3927: 3924: 3921: 3918: 3917: 3916: 3915: 3908: 3905: 3902: 3901: 3900: 3899: 3892: 3891: 3890: 3889: 3888:Writing grips 3882: 3879: 3877: 3873: 3872: 3871: 3870: 3858: 3855: 3852: 3849: 3846: 3843: 3840: 3837: 3834: 3830: 3827: 3824: 3823: 3822: 3821: 3814: 3811: 3808: 3805: 3802: 3798: 3795: 3791: 3788: 3785: 3782: 3779: 3778: 3777: 3776: 3769: 3766: 3763: 3760: 3757: 3754: 3751: 3748: 3745: 3742: 3739: 3736: 3733: 3730: 3727: 3724: 3721: 3720: 3719: 3718: 3711: 3708: 3704: 3701: 3698: 3695: 3692: 3689: 3686: 3682: 3681: 3680: 3679: 3668: 3665:Often has an 3664: 3661: 3658: 3655: 3652: 3649: 3646: 3643: 3640: 3637: 3634: 3633: 3632: 3631: 3624: 3620: 3617: 3613: 3610: 3607: 3604: 3601: 3597: 3594: 3590: 3587: 3583: 3579: 3575: 3572: 3569: 3566: 3562: 3559: 3558: 3557: 3556: 3549: 3546: 3543: 3540: 3536: 3533: 3529: 3526: 3523:Knows what a 3522: 3519: 3516: 3513: 3510: 3507: 3504: 3501: 3498: 3495: 3492: 3489: 3486: 3483: 3482: 3481: 3480: 3473: 3470: 3467: 3464: 3461: 3458: 3455: 3452: 3448: 3444: 3441: 3438: 3435: 3432: 3429: 3426: 3423: 3422: 3421: 3420: 3413: 3410: 3407: 3404: 3401: 3400: 3399: 3398: 3392:Five-year-old 3381: 3378: 3375: 3372: 3369: 3366: 3363: 3360: 3357: 3354: 3351: 3348: 3345: 3341: 3338: 3335: 3332: 3331: 3330: 3329: 3322: 3318: 3315: 3312: 3309: 3306: 3303: 3300: 3297: 3294: 3291: 3290: 3289: 3288: 3281: 3278: 3275: 3272: 3269: 3266: 3263: 3260: 3257: 3253: 3250: 3247: 3244: 3241: 3240: 3239: 3238: 3231: 3228: 3225: 3222: 3219: 3216: 3213: 3210: 3207: 3204: 3201: 3198: 3195: 3192: 3189: 3186: 3183: 3182: 3181: 3180: 3173: 3170: 3167: 3166: 3165: 3164: 3158:Four-year-old 3152: 3149: 3146: 3143: 3139: 3136: 3133: 3130: 3127: 3124: 3123: 3122: 3121: 3114: 3110: 3107: 3104: 3101: 3098: 3095: 3092: 3089: 3086: 3083: 3080: 3077: 3074: 3071: 3068: 3065: 3062: 3059: 3056: 3053: 3050: 3047: 3044: 3041: 3038: 3037: 3036: 3035: 3028: 3025: 3022: 3019: 3016: 3012: 3009: 3006: 3002: 2999: 2996: 2993: 2990: 2989: 2988: 2987: 2975: 2972: 2969: 2966: 2963: 2962:parallel play 2959: 2956: 2953: 2950: 2947: 2944: 2941: 2937: 2936: 2935: 2934: 2927: 2924: 2921: 2918: 2914: 2910: 2907: 2904: 2901: 2898: 2895: 2892: 2889: 2886: 2883: 2882: 2881: 2880: 2873: 2870: 2867: 2863: 2860: 2857: 2854: 2850: 2846: 2842: 2838: 2835: 2832: 2829: 2826: 2823: 2822: 2821: 2820: 2813: 2810: 2807: 2804: 2801: 2798: 2795: 2792: 2788: 2784: 2781: 2778: 2775: 2772: 2771: 2770: 2769: 2762: 2759: 2756: 2753: 2750: 2749: 2748: 2747: 2735: 2732: 2729: 2726: 2723: 2720: 2717: 2716: 2715: 2714: 2707: 2704: 2700: 2696: 2693: 2690: 2687: 2684: 2681: 2678: 2675: 2672: 2671: 2670: 2669: 2662: 2659: 2656: 2653: 2650: 2647: 2644: 2641: 2638: 2635: 2632: 2629: 2624: 2621: 2617: 2616: 2615: 2614: 2607: 2603: 2600: 2597: 2593: 2590: 2587: 2584: 2580: 2576: 2572: 2569: 2566: 2563: 2559: 2555: 2551: 2547: 2544: 2543:picture books 2540: 2537: 2534:Puts toys in 2533: 2530: 2526: 2524:development). 2523: 2519: 2516: 2513: 2512: 2511: 2510: 2503: 2500: 2497: 2494: 2491: 2488: 2485: 2482: 2479: 2476: 2473: 2470: 2467: 2464: 2461: 2458: 2455: 2454: 2453: 2452: 2445: 2442: 2439: 2436: 2433: 2430: 2426: 2423: 2420: 2417: 2416: 2415: 2414: 2397: 2393: 2390: 2387: 2384: 2381: 2380:hearing tests 2377: 2374: 2371: 2368: 2365: 2362: 2359: 2356: 2353: 2350: 2347: 2344: 2341: 2338: 2335: 2332: 2329: 2326: 2323: 2320: 2317: 2316: 2315: 2314: 2307: 2304: 2301: 2298: 2295: 2292: 2289: 2285: 2281: 2277: 2274: 2271: 2268: 2265: 2262: 2259: 2258: 2257: 2256: 2244: 2243: 2242: 2241: 2234: 2231: 2228:Responds to " 2227: 2226: 2225: 2224: 2217: 2214: 2213: 2212: 2211: 2204: 2201: 2200: 2199: 2198: 2191: 2190: 2189: 2188: 2176: 2173: 2170: 2167: 2164: 2163: 2162: 2161: 2154: 2150: 2147: 2144: 2141: 2138: 2135: 2134: 2133: 2132: 2125: 2122: 2119: 2116: 2112: 2111: 2110: 2109: 2102: 2099: 2096: 2093: 2092: 2091: 2090: 2083: 2080: 2079: 2078: 2077: 2070: 2067: 2064: 2060: 2057: 2054: 2051: 2048: 2045: 2041: 2040: 2039: 2038: 2031: 2030: 2029: 2028: 2016: 2013: 2010: 2007: 2004: 2001: 1998: 1995: 1994: 1993: 1992: 1985: 1982: 1979: 1975: 1972: 1971: 1970: 1969: 1962: 1959: 1958: 1957: 1956: 1949: 1946: 1943: 1939: 1936: 1935: 1934: 1933: 1926: 1923: 1920: 1917: 1913: 1912: 1911: 1910: 1903: 1900: 1897: 1894: 1891: 1888: 1885: 1881: 1880: 1879: 1878: 1870: 1869: 1868: 1867: 1855: 1852: 1851: 1850: 1849: 1842: 1841: 1840: 1839: 1827: 1824: 1821: 1818: 1817: 1816: 1815: 1808: 1805: 1804: 1803: 1802: 1795: 1794: 1793: 1792: 1785: 1782: 1779: 1776: 1775: 1774: 1773: 1766: 1763: 1760: 1756: 1753: 1750: 1749: 1748: 1747: 1740: 1737: 1736: 1735: 1734: 1722: 1719: 1716: 1713: 1710: 1706: 1702: 1699: 1696: 1695: 1694: 1693: 1686: 1683: 1682: 1681: 1680: 1673: 1670: 1669: 1668: 1667: 1660: 1659: 1658: 1657: 1650: 1647: 1644: 1643: 1642: 1641: 1634: 1631: 1628: 1625: 1622: 1619: 1615: 1612: 1609: 1608: 1607: 1606: 1599: 1598: 1597: 1596: 1590:One month old 1584: 1581: 1580: 1579: 1578: 1571: 1568: 1565: 1564: 1563: 1562: 1555: 1552: 1551: 1550: 1549: 1540: 1536: 1533: 1529: 1526: 1522: 1519: 1515: 1514: 1513:, including: 1512: 1508: 1505: 1504: 1503: 1502: 1495: 1492: 1489: 1486: 1482: 1481: 1480: 1479: 1458: 1455: 1452: 1451: 1450: 1445: 1444: 1443: 1438: 1435: 1432: 1431: 1430: 1425: 1422: 1419: 1418: 1417: 1414: 1413: 1407: 1404: 1401: 1400: 1399: 1394: 1393: 1392: 1387: 1384: 1381: 1378: 1377: 1376: 1371: 1368: 1365: 1364: 1363: 1360: 1359: 1355: 1352: 1348: 1344: 1340: 1338: 1334: 1331: 1328: 1325: 1324: 1323: 1321:6 years 1320: 1319: 1315: 1313: 1310: 1305: 1302: 1298: 1295: 1292: 1289: 1288: 1287: 1285:5 years 1284: 1283: 1277: 1273: 1270: 1269: 1268: 1266: 1261: 1258: 1257: 1256: 1251: 1249: 1245: 1242: 1239: 1236: 1233: 1232: 1231: 1229:4 years 1228: 1227: 1222: 1219: 1216: 1213: 1212: 1211: 1209: 1204: 1202: 1198: 1197: 1196: 1191: 1189: 1185: 1182: 1179: 1176: 1173: 1172: 1171: 1169:3 years 1168: 1167: 1161: 1159: 1158:Parallel play 1156: 1155: 1154: 1149: 1148: 1147: 1142: 1139: 1137: 1133: 1129: 1128: 1127: 1122: 1120: 1116: 1114: 1110: 1109: 1108: 1106:2 years 1105: 1104: 1098: 1095: 1091: 1088: 1087: 1086: 1083: 1080: 1075: 1073: 1069: 1065: 1062: 1060: 1057:holding onto 1056: 1053:Gets up/down 1052: 1049: 1046: 1042: 1041: 1040: 1037: 1036: 1030: 1028:Waves goodbye 1027: 1025: 1021: 1020: 1019: 1016: 1013: 1010: 1005: 1002: 1001: 1000: 997: 996: 992: 989: 986: 982: 978: 975: 973: 969: 968: 967: 964: 963: 960: 956: 951: 948: 947:Visual acuity 945: 942: 941: 940: 935: 932: 931: 930: 925: 922: 919: 916: 913: 912: 911: 908: 907: 901: 900: 899: 894: 891: 890: 889: 886: 881: 878: 875: 874: 873: 870: 869: 863: 860: 857: 854: 853: 852: 847: 844: 840: 837: 836: 835: 832: 828: 824: 821: 820: 819: 816: 815: 811: 806: 803: 802: 801: 796: 793: 790: 787: 786: 785: 780: 777: 774: 773: 772: 769: 768: 762: 759: 756: 755: 754: 751: 746: 743: 742: 741: 738: 734: 731: 730: 724: 721: 718: 715: 714: 713: 710: 707: 704: 701: 700: 696: 693: 690: 687: 684: 680: 670: 661: 659: 654: 650: 647: 643: 639: 628: 623: 621: 616: 614: 609: 608: 606: 605: 600: 590: 589: 588: 587: 582: 579: 577: 574: 572: 569: 567: 564: 562: 559: 557: 554: 552: 549: 547: 544: 543: 542: 541: 537: 533: 532: 527: 524: 522: 519: 517: 514: 512: 509: 507: 504: 502: 499: 497: 494: 492: 489: 488: 487: 486: 483: 480: 479: 474: 471: 469: 466: 464: 461: 459: 456: 454: 451: 449: 446: 444: 441: 439: 436: 434: 433:Fertilization 431: 430: 429: 428: 424: 423: 418: 415: 413: 410: 408: 405: 403: 400: 398: 395: 392: 389: 387: 386:Preadolescent 384: 382: 379: 376: 373: 371: 368: 365: 362: 360: 357: 355: 352: 350: 347: 346: 345: 344: 340: 339: 335: 331: 330: 327: 322: 321: 317: 313: 312: 309: 301: 298: 283: 280: 272: 262: 258: 252: 251: 244: 235: 234: 225: 222: 214: 211:November 2009 203: 200: 196: 193: 189: 186: 182: 179: 175: 172: – 171: 167: 166:Find sources: 160: 156: 150: 149: 144:This article 142: 138: 133: 132: 124: 123:(August 2010) 120: 116: 112: 110: 104: 99: 95: 90: 89: 84: 82: 75: 74: 69: 68: 63: 58: 49: 48: 43: 37: 33: 19: 6372:Jerome Kagan 6367:Harry Harlow 6357:Erik Erikson 6172:Middle adult 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