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Sampling bias

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107:. For example, a survey of high school students to measure teenage use of illegal drugs will be a biased sample because it does not include home-schooled students or dropouts. A sample is also biased if certain members are underrepresented or overrepresented relative to others in the population. For example, a "man on the street" interview which selects people who walk by a certain location is going to have an overrepresentation of healthy individuals who are more likely to be out of the home than individuals with a chronic illness. This may be an extreme form of biased sampling, because certain members of the population are totally excluded from the sample (that is, they have zero probability of being selected). 497:, as they stem from the same chemical process(es). These correlations depend on space (i.e., location) and time (i.e., period). Therefore, a pollutant distribution is not necessarily representative for every location and every period. If a low-cost measurement instrument is calibrated with field data in a multivariate manner, more precisely by collocation next to a reference instrument, the relationships between the different compounds are incorporated into the calibration model. By relocation of the measurement instrument, erroneous results can be produced. 546: 365:. In statistical usage, bias merely represents a mathematical property, no matter if it is deliberate or unconscious or due to imperfections in the instruments used for observation. While some individuals might deliberately use a biased sample to produce misleading results, more often, a biased sample is just a reflection of the difficulty in obtaining a truly representative sample, or ignorance of the bias in their process of measurement or analysis. An example of how ignorance of a bias can exist is in the widespread use of a ratio (a.k.a. 369:) as a measure of difference in biology. Because it is easier to achieve a large ratio with two small numbers with a given difference, and relatively more difficult to achieve a large ratio with two large numbers with a larger difference, large significant differences may be missed when comparing relatively large numeric measurements. Some have called this a 'demarcation bias' because the use of a ratio (division) instead of a difference (subtraction) removes the results of the analysis from science into pseudoscience (See 128:, which are biased samples because the respondents are self-selected. Those individuals who are highly motivated to respond, typically individuals who have strong opinions, are overrepresented, and individuals that are indifferent or apathetic are less likely to respond. This often leads to a polarization of responses with extreme perspectives being given a disproportionate weight in the summary. As a result, these types of polls are regarded as unscientific. 3058: 380:, for example, deliberately oversamples from minority populations in many of its nationwide surveys in order to gain sufficient precision for estimates within these groups. These surveys require the use of sample weights (see later on) to produce proper estimates across all ethnic groups. Provided that certain conditions are met (chiefly that the weights are calculated and used correctly) these samples permit accurate estimation of population parameters. 238: 389: 422:, by a large margin. The result was the exact opposite. The Literary Digest survey represented a sample collected from readers of the magazine, supplemented by records of registered automobile owners and telephone users. This sample included an over-representation of wealthy individuals, who, as a group, were more likely to vote for the Republican candidate. In contrast, a poll of only 50 thousand citizens selected by 267:. In a perfect world we should be able to discover all such families with a gene including those who are simply carriers. In this situation the analysis would be free from ascertainment bias and the pedigrees would be under "nontruncate selection" In practice, most studies identify, and include, families in a study based upon them having affected individuals. 524:
If entire segments of the population are excluded from a sample, then there are no adjustments that can produce estimates that are representative of the entire population. But if some groups are underrepresented and the degree of underrepresentation can be quantified, then sample weights can correct
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in the population. Sampling bias occurs in practice as it is practically impossible to ensure perfect randomness in sampling. If the degree of misrepresentation is small, then the sample can be treated as a reasonable approximation to a random sample. Also, if the sample does not differ markedly in
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require for many real-time and some longitudinal forms of study). Participants' decision to participate may be correlated with traits that affect the study, making the participants a non-representative sample. For example, people who have strong opinions or substantial knowledge may be more willing
257:). In this case their children will each have a 25% chance of showing the characteristic. The problem arises because we can't tell which families have both parents as carriers (heterozygous) unless they have a child who exhibits the characteristic. The description follows the textbook by Sutton. 277:
have an equal chance of being included in a study this is called truncate selection, signifying the inadvertent exclusion (truncation) of families who are carriers for a gene. Because selection is performed on the individual level, families with two or more affected children would have a higher
459:. Survey research was then in its infancy, and few academics realized that a sample of telephone users was not representative of the general population. Telephones were not yet widespread, and those who had them tended to be prosperous and have stable addresses. (In many cities, the 153:, when the study population is likely healthier than the general population. For example, someone in poor health is unlikely to have a job as manual laborer, so if a study is conducted on manual laborers, the health of the general population will likely be overestimated. 229:, parents try to prevent their children from being stigmatized with those diagnoses, introducing further bias. Studies carefully selected from whole populations are showing that many conditions are much more common and usually much milder than formerly believed. 50:
of a population (or non-human factors) in which all individuals, or instances, were not equally likely to have been selected. If this is not accounted for, results can be erroneously attributed to the phenomenon under study rather than to the method of
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of 2.5 for each male and 0.625 for each female. This would adjust any estimates to achieve the same expected value as a sample that included exactly 50 men and 50 women, unless men and women differed in their likelihood of taking part in the survey.
189:, in which only "surviving" subjects are selected, ignoring those that fell out of view. For example, using the record of current companies as an indicator of business climate or economy ignores the businesses that failed and no longer exist. 140:
into the study area (this may occur when newcomers are not available in a register used to identify the source population). Excluding subjects who move out of the study area during follow-up is rather equivalent of dropout or nonresponse, a
337:, etc. are most likely to remain intact to the modern era in caves. Prehistoric people are associated with caves because that is where the data still exists, not necessarily because most of them lived in caves for most of their lives. 90:
for differences or similarities found in the sample at hand. In this sense, errors occurring in the process of gathering the sample or cohort cause sampling bias, while errors in any process thereafter cause selection bias.
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The study of medical conditions begins with anecdotal reports. By their nature, such reports only include those referred for diagnosis and treatment. A child who can't function in school is more likely to be diagnosed with
161:, when the study population is selected from a hospital and so is less healthy than the general population. This can result in a spurious negative correlation between diseases: a hospital patient without diabetes is 528:
For example, a hypothetical population might include 10 million men and 10 million women. Suppose that a biased sample of 100 patients included 20 men and 80 women. A researcher could correct for this imbalance by
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The probabilities of each of the families being selected is given in the figure, with the sample frequency of affected children also given. In this simple case, the researcher will look for a frequency of
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Geneticists are limited in how they can obtain data from human populations. As an example, consider a human characteristic. We are interested in deciding if the characteristic is inherited as a
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made nearly 40,000 years ago. If there had been contemporary paintings on trees, animal skins or hillsides, they would have been washed away long ago. Similarly, evidence of fire pits,
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the bias. However, the success of the correction is limited to the selection model chosen. If certain variables are missing the methods used to correct the bias could be inaccurate.
752: 207:, the uncritical assumption that all members or cases of a certain class or type are like those that receive the most attention or coverage in the media. 221:
than a child who struggles but passes. A child examined for one condition is more likely to be tested for and diagnosed with other conditions, skewing
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that actually is a result of the exposure. The control group becomes more similar to the cases in regard to exposure than does the general population.
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A classic example of a biased sample and the misleading results it produced occurred in 1936. In the early days of opinion polling, the American
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computed of the sample is systematically erroneous. Sampling bias can lead to a systematic over- or under-estimation of the corresponding
777: 624: 434: 411: 253:, if the parents in a family do not have the characteristic, but carry the allele for it, they are carriers (e.g. a non-expressive 1952: 748: 1059: 1032: 1005: 926: 697: 377: 807: 3119: 2558: 470:). In addition, the Gallup poll that the Tribune based its headline on was over two weeks old at the time of the printing. 448: 2215: 2057: 3087: 62:. Ascertainment bias has basically the same definition, but is still sometimes classified as a separate type of bias. 3138: 2369: 1296:
Cuddeback G, Wilson E, Orme JG, Combs-Orme T (2004). "Detecting and Statistically Correcting Sample Selection Bias".
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The figure shows the pedigrees of all the possible families with two children when the parents are carriers (Aa).
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bias results from exclusion of particular groups from the sample, e.g. exclusion of subjects who have recently
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Some samples use a biased statistical design which nevertheless allows the estimation of parameters. The U.S.
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has a strong negative connotation. Indeed, biases sometimes come from deliberate intent to mislead or other
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magazine collected over two million postal surveys and predicted that the Republican candidate in the
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Ward D (20 April 2020). Sampling Bias: Explaining Wide Variations in COVID-19 Case Fatality Rates.
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Selection and linkage desequilibrium tests under complex demographies and ascertainment bias
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An example of selection bias is called the "caveman effect". Much of our understanding of
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of a test (the ability of its results to be generalized to the entire population), while
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Berk RA (June 1983). "An Introduction to Sample Selection Bias in Sociological Data".
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the quantity being measured, then a biased sample can still be a reasonable estimate.
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test. Due to the nature of the test, the sample consisted mostly of web developers.
362: 20: 952:"Domain adaptation and sample bias correction theory and algorithm for regression" 936: 2787: 2751: 2727: 2547: 2519: 2499: 2347: 2315: 2299: 2264: 1937: 1927: 1704: 1684: 1599: 1502: 1477: 1472: 1445: 1423: 1335: 1049: 1022: 995: 815: 478: 467: 452: 438: 406: 137: 120: 918: 169:, since they must have had some reason to enter the hospital in the first place. 2688: 2673: 2595: 2514: 2440: 2080: 1979: 1974: 1964: 1887: 1804: 1764: 1714: 1659: 1649: 1634: 1629: 1594: 1549: 1514: 1418: 1367: 1271: 951: 589: 579: 193: 142: 83: 71: 38:
in which a sample is collected in such a way that some members of the intended
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statistics. As certain diagnoses become associated with behavior problems or
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with an affected child has an equal chance of being selected for the study.
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to spend time answering a survey than those who do not. Another example is
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for the characteristic, depending on the type of truncate selection used.
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However, selection bias and sampling bias are often used synonymously.
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DNA fingerprinting in plants: principles, methods, and applications
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Example of biased sample: as of June 2008 55% of web browsers (
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in that it rather affects the internal validity of the study.
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Sampling bias is problematic because it is possible that a
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Maxcy-Rosenau-Last Public Health and Preventive Medicine
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have been shown to account for wide variations in both
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Sampling bias is usually classified as a subtype of
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Medical sources sometimes refer to sampling bias as
878:Cortes C, Mohri M, Riley M, Rostamizadeh A (2008). 1000:. Lippincott Williams & Wilkins. p. 262. 65: 712: 3162: 340: 943: 2176:Affirmative conclusion from a negative premise 1113:. National Center for Health Statistics. 2007. 871: 836: 688:. London: Taylor & Francis Group. p.  278:probability of becoming included in the study. 3088: 2181:Negative conclusion from affirmative premises 2051: 1343: 1253:Böttcher L, D'Orsogna MR, Chou T (May 2021). 1170: 165:likely to have another given disease such as 830: 2065: 1054:(4th ed.). Harcourt Brace Jovanovich. 1014: 949: 837:Ards S, Chung C, Myers SL (February 1998). 520:Statistical corrections for a biased sample 3095: 3081: 2058: 2044: 2006:Heuristics in judgment and decision-making 1350: 1336: 1041: 2759: 1280: 1270: 1206: 1196: 987: 970: 908: 898: 880:"Sample Selection Bias Correction Theory" 854: 211: 3102: 2912: 713:RamĂ­rez i Soriano A (29 November 2008). 433:Another classic example occurred in the 387: 241:Simple pedigree example of sampling bias 236: 1020: 749:Society for Academic Emergency Medicine 735: 681: 670:Mosby's Medical Dictionary, 8th edition 504:, where variations in sampling bias in 3163: 1047: 731: 729: 500:A twenty-first century example is the 418:, would beat the incumbent president, 383: 233:Truncate selection in pedigree studies 3076: 2039: 1331: 993: 889:. Lecture Notes in Computer Science. 738:"Error and Bias in Clinical Research" 378:National Center for Health Statistics 316: 3120:Correlation does not imply causation 1229: 1171:Tancev G, Pascale C (October 2020). 1144: 1074: 16:Bias in the sampling of a population 726: 13: 1298:Journal of Social Service Research 325:peoples comes from caves, such as 14: 3192: 3139:Lies, damned lies, and statistics 1051:An Introduction to Human Genetics 3057: 3056: 1259:European Journal of Epidemiology 544: 466:contained the same names as the 74:, sometimes specifically termed 1289: 1246: 1223: 1164: 1138: 1117: 1103: 1068: 66:Distinction from selection bias 2554:Correlation implies causation 800: 782:Medilexicon Medical Dictionary 770: 706: 675: 647: 617: 1: 1240:10.13140/RG.2.2.24953.62564/1 1234:(Report). Bern, Switzerland. 856:10.1016/S0145-2134(97)00131-2 610: 341:Problems due to sampling bias 284:is a special case where each 249:trait. Following the laws of 121:human-subject research ethics 46:than others. It results in a 1151:The Engines of Our Ingenuity 1077:American Sociological Review 959:Theoretical Computer Science 7: 1872:DĂ©formation professionnelle 919:10.1007/978-3-540-87987-9_8 887:Algorithmic Learning Theory 537: 516:of cases across countries. 282:Complete truncate selection 177:, matching for an apparent 10: 3197: 3126:How to Lie with Statistics 2978:I'm entitled to my opinion 1866:Basking in reflected glory 1357: 1272:10.1007/s10654-021-00748-2 950:Cortes C, Mohri M (2014). 812:Dictionary of Cancer Terms 605:Truncated regression model 477:data, pollutants (such as 435:1948 presidential election 412:U.S. presidential election 396:) in use did not pass the 18: 3110: 3052: 2961: 2900: 2834: 2750: 2659: 2634: 2609: 2533: 2485: 2421: 2396: 2368: 2333: 2283: 2237: 2228: 2166: 2132: 2088: 2079: 2014: 1996:Cognitive bias mitigation 1988: 1853: 1728: 1365: 1127:. Refsnes Data. June 2008 981:10.1016/j.tcs.2013.09.027 843:Child Abuse & Neglect 560:Censored regression model 437:. On election night, the 126:online and phone-in polls 3004:Motte-and-bailey fallacy 2104:Affirming the consequent 1580:Illusion of transparency 565:Cherry picking (fallacy) 97: 3024:Two wrongs make a right 2355:Denying the correlative 736:Panacek EA (May 2009). 493:) frequently show high 227:intellectual disability 42:have a lower or higher 3009:Psychologist's fallacy 2946:Argument to moderation 2936:Argument from anecdote 2886:Chronological snobbery 2510:Quoting out of context 2477:Overwhelming exception 2360:Suppressed correlative 2260:Quoting out of context 2135:quantificational logic 2109:Denying the antecedent 401: 242: 212:Symptom-based sampling 3171:Sampling (statistics) 3133:Impression management 2972:The Four Great Errors 2952:Argumentum ad populum 2941:Argument from silence 2645:Argumentum ad baculum 2423:Faulty generalization 2114:Argument from fallacy 1948:Arab–Israeli conflict 1675:Social influence bias 1620:Out-group homogeneity 1310:10.1300/J079v30n03_02 441:printed the headline 391: 265:Nontruncate selection 251:Mendelian inheritance 240: 76:sample selection bias 3176:Misuse of statistics 3104:Misuse of statistics 2990:Invincible ignorance 2796:Reductio ad Stalinum 2782:Reductio ad Hitlerum 2738:Wisdom of repugnance 2505:Moving the goalposts 2370:Illicit transference 2295:Begging the question 2216:Undistributed middle 2124:Mathematical fallacy 2099:Affirming a disjunct 1590:Mere-exposure effect 1520:Extrinsic incentives 1466:Selective perception 1125:"Browser Statistics" 778:"Ascertainment Bias" 585:Sampling probability 444:DEWEY DEFEATS TRUMAN 44:sampling probability 2723:Parade of horribles 2699:In-group favoritism 2525:Syntactic ambiguity 2168:Syllogistic fallacy 2091:propositional logic 1815:Social desirability 1710:von Restorff effect 1585:Mean world syndrome 1560:Hostile attribution 1189:2020Senso..20.6198T 747:. New Orleans, LA: 745:SAEM Annual Meeting 570:File drawer problem 510:case fatality rates 464:telephone directory 384:Historical examples 371:Demarcation Problem 2809:Poisoning the well 2626:Proof by assertion 2601:Texas sharpshooter 2535:Questionable cause 2472:Slothful induction 2431:Anecdotal evidence 2291:Circular reasoning 2186:Exclusive premises 2148:Illicit conversion 1730:Statistical biases 1508:Curse of knowledge 1048:Sutton HE (1988). 1021:Wallace R (2007). 997:Behavioral Science 682:Weising K (2005). 629:Medical Dictionary 595:Common source bias 575:Friendship paradox 552:Mathematics portal 531:attaching a weight 420:Franklin Roosevelt 402: 317:The caveman effect 271:Truncate selection 243: 105:specific real area 60:ascertainment bias 3181:Experimental bias 3158: 3157: 3115:Circular analysis 3070: 3069: 3048: 3047: 3044: 3043: 2984:Ignoratio elenchi 2896: 2895: 2746: 2745: 2708:Not invented here 2413:Converse accident 2335:Correlative-based 2312:Compound question 2255:False attribution 2250:False equivalence 2224: 2223: 2033: 2032: 1670:Social comparison 1451:Choice-supportive 1198:10.3390/s20216198 1111:"Minority Health" 1061:978-0-15-540099-3 1034:978-0-07-159318-2 1007:978-0-7817-8257-9 928:978-3-540-87986-2 758:on 17 August 2016 699:978-0-8493-1488-9 659:TheFreeDictionary 502:COVID-19 pandemic 483:nitrogen monoxide 394:Internet Explorer 273:. When afflicted 205:Spotlight fallacy 186:Survivorship bias 158:Berkson's fallacy 150:Healthy user bias 117:Non-response bias 103:Selection from a 88:internal validity 86:mainly addresses 80:external validity 3188: 3145:Misleading graph 3097: 3090: 3083: 3074: 3073: 3060: 3059: 3031:Special pleading 2910: 2909: 2771:Appeal to motive 2757: 2756: 2733:Stirring symbols 2713:Island mentality 2651:Wishful thinking 2632: 2631: 2348:Perfect solution 2325:No true Scotsman 2320:Complex question 2305:Leading question 2284:Question-begging 2270:No true Scotsman 2235: 2234: 2158:Quantifier shift 2153:Proof by example 2086: 2085: 2060: 2053: 2046: 2037: 2036: 1830:Systematic error 1785:Omitted-variable 1700:Trait ascription 1540:Frog pond effect 1368:Cognitive biases 1352: 1345: 1338: 1329: 1328: 1322: 1321: 1293: 1287: 1286: 1284: 1274: 1250: 1244: 1243: 1227: 1221: 1220: 1210: 1200: 1168: 1162: 1161: 1159: 1157: 1142: 1136: 1135: 1133: 1132: 1121: 1115: 1114: 1107: 1101: 1100: 1072: 1066: 1065: 1045: 1039: 1038: 1018: 1012: 1011: 994:Fadem B (2009). 991: 985: 984: 974: 956: 947: 941: 940: 912: 902: 884: 875: 869: 868: 858: 834: 828: 827: 825: 823: 814:. 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Archived from 621: 554: 549: 548: 514:age distribution 506:COVID-19 testing 487:nitrogen dioxide 363:scientific fraud 312: 311: 307: 302: 301: 297: 247:simple Mendelian 21:Spotlight effect 3196: 3195: 3191: 3190: 3189: 3187: 3186: 3185: 3161: 3160: 3159: 3154: 3106: 3101: 3071: 3066: 3040: 3014:Rationalization 2957: 2904: 2892: 2830: 2752:Genetic fallacy 2742: 2655: 2630: 2605: 2529: 2520:Sorites paradox 2500:False precision 2481: 2462:Double counting 2417: 2392: 2364: 2329: 2316:Loaded question 2300:Loaded language 2279: 2220: 2162: 2128: 2075: 2064: 2034: 2029: 2010: 1984: 1849: 1724: 1705:Turkey illusion 1473:Compassion fade 1370: 1361: 1356: 1326: 1325: 1294: 1290: 1251: 1247: 1228: 1224: 1169: 1165: 1155: 1153: 1143: 1139: 1130: 1128: 1123: 1122: 1118: 1109: 1108: 1104: 1089:10.2307/2095230 1073: 1069: 1062: 1046: 1042: 1035: 1019: 1015: 1008: 992: 988: 972:10.1.1.367.6899 954: 948: 944: 929: 910:10.1.1.144.4478 882: 876: 872: 835: 831: 821: 819: 806: 805: 801: 791: 789: 776: 775: 771: 761: 759: 755: 740: 734: 727: 719: 711: 707: 700: 680: 676: 663: 661: 655:"Biased sample" 653: 652: 648: 638: 636: 625:"Sampling Bias" 623: 622: 618: 613: 550: 543: 540: 522: 479:carbon monoxide 468:Social Register 453:Harry S. Truman 449:president-elect 439:Chicago Tribune 407:Literary Digest 386: 343: 319: 309: 305: 304: 299: 295: 294: 235: 214: 115:bias (see also 100: 68: 24: 17: 12: 11: 5: 3194: 3184: 3183: 3178: 3173: 3156: 3155: 3153: 3152: 3147: 3142: 3135: 3130: 3122: 3117: 3111: 3108: 3107: 3100: 3099: 3092: 3085: 3077: 3068: 3067: 3065: 3064: 3053: 3050: 3049: 3046: 3045: 3042: 3041: 3039: 3038: 3033: 3028: 3027: 3026: 3016: 3011: 3006: 3001: 2992: 2987: 2980: 2975: 2968: 2962: 2959: 2958: 2956: 2955: 2948: 2943: 2938: 2933: 2932: 2931: 2918: 2916: 2907: 2898: 2897: 2894: 2893: 2891: 2890: 2889: 2888: 2874: 2869: 2864: 2863: 2862: 2853: 2846: 2844:Accomplishment 2835: 2832: 2831: 2829: 2828: 2823: 2816: 2811: 2806: 2801: 2800: 2799: 2792: 2791: 2790: 2773: 2767: 2765: 2754: 2748: 2747: 2744: 2743: 2741: 2740: 2735: 2730: 2725: 2720: 2715: 2710: 2701: 2696: 2691: 2686: 2681: 2676: 2671: 2665: 2663: 2657: 2656: 2654: 2653: 2648: 2640: 2638: 2629: 2628: 2619: 2613: 2611: 2607: 2606: 2604: 2603: 2598: 2596:Slippery slope 2593: 2588: 2583: 2582: 2581: 2571: 2570: 2569: 2562: 2552: 2551: 2550: 2539: 2537: 2531: 2530: 2528: 2527: 2522: 2517: 2515:Slippery slope 2512: 2507: 2502: 2497: 2491: 2489: 2483: 2482: 2480: 2479: 2474: 2469: 2464: 2459: 2450: 2449: 2448: 2443: 2441:Cherry picking 2433: 2427: 2425: 2419: 2418: 2416: 2415: 2410: 2404: 2402: 2394: 2393: 2391: 2390: 2385: 2380: 2374: 2372: 2366: 2365: 2363: 2362: 2357: 2352: 2351: 2350: 2339: 2337: 2331: 2330: 2328: 2327: 2322: 2309: 2308: 2307: 2297: 2287: 2285: 2281: 2280: 2278: 2277: 2272: 2267: 2262: 2257: 2252: 2247: 2241: 2239: 2232: 2226: 2225: 2222: 2221: 2219: 2218: 2213: 2208: 2203: 2198: 2193: 2188: 2183: 2178: 2172: 2170: 2164: 2163: 2161: 2160: 2155: 2150: 2145: 2139: 2137: 2130: 2129: 2127: 2126: 2121: 2116: 2111: 2106: 2101: 2095: 2093: 2083: 2077: 2076: 2063: 2062: 2055: 2048: 2040: 2031: 2030: 2028: 2027: 2022: 2015: 2012: 2011: 2009: 2008: 2003: 1998: 1992: 1990: 1989:Bias reduction 1986: 1985: 1983: 1982: 1977: 1972: 1967: 1965:Political bias 1962: 1957: 1956: 1955: 1950: 1945: 1940: 1935: 1930: 1925: 1920: 1910: 1905: 1900: 1895: 1893:Infrastructure 1890: 1885: 1880: 1875: 1868: 1863: 1857: 1855: 1851: 1850: 1848: 1847: 1842: 1837: 1832: 1827: 1822: 1817: 1812: 1810:Self-selection 1807: 1802: 1797: 1792: 1787: 1782: 1777: 1772: 1767: 1762: 1761: 1760: 1750: 1745: 1740: 1734: 1732: 1726: 1725: 1723: 1722: 1717: 1712: 1707: 1702: 1697: 1692: 1687: 1682: 1677: 1672: 1667: 1662: 1657: 1652: 1647: 1645:Pro-innovation 1642: 1637: 1632: 1630:Overton window 1627: 1622: 1617: 1612: 1607: 1602: 1597: 1592: 1587: 1582: 1577: 1572: 1567: 1562: 1557: 1552: 1547: 1542: 1537: 1532: 1527: 1522: 1517: 1512: 1511: 1510: 1500: 1498:Dunning–Kruger 1495: 1490: 1485: 1480: 1475: 1470: 1469: 1468: 1458: 1453: 1448: 1443: 1438: 1437: 1436: 1426: 1421: 1416: 1415: 1414: 1412:Correspondence 1409: 1407:Actor–observer 1399: 1394: 1389: 1384: 1379: 1373: 1371: 1366: 1363: 1362: 1355: 1354: 1347: 1340: 1332: 1324: 1323: 1288: 1265:(5): 545–558. 1245: 1222: 1163: 1137: 1116: 1102: 1083:(3): 386–398. 1067: 1060: 1040: 1033: 1013: 1006: 986: 942: 927: 870: 829: 818:on 9 June 2009 799: 769: 725: 705: 698: 674: 646: 615: 614: 612: 609: 608: 607: 602: 597: 592: 590:Selection bias 587: 582: 580:Reporting bias 577: 572: 567: 562: 556: 555: 539: 536: 521: 518: 385: 382: 342: 339: 327:cave paintings 318: 315: 290: 289: 279: 268: 234: 231: 213: 210: 209: 208: 199: 198: 194:Malmquist bias 190: 182: 170: 154: 146: 143:selection bias 130: 129: 112:Self-selection 108: 99: 96: 84:selection bias 72:selection bias 67: 64: 15: 9: 6: 4: 3: 2: 3193: 3182: 3179: 3177: 3174: 3172: 3169: 3168: 3166: 3151: 3150:Sampling bias 3148: 3146: 3143: 3140: 3136: 3134: 3131: 3128: 3127: 3123: 3121: 3118: 3116: 3113: 3112: 3109: 3105: 3098: 3093: 3091: 3086: 3084: 3079: 3078: 3075: 3063: 3055: 3054: 3051: 3037: 3034: 3032: 3029: 3025: 3022: 3021: 3020: 3017: 3015: 3012: 3010: 3007: 3005: 3002: 3000: 2996: 2993: 2991: 2988: 2986: 2985: 2981: 2979: 2976: 2974: 2973: 2969: 2967: 2964: 2963: 2960: 2954: 2953: 2949: 2947: 2944: 2942: 2939: 2937: 2934: 2930: 2927: 2926: 2925: 2924: 2920: 2919: 2917: 2915: 2911: 2908: 2906: 2899: 2887: 2884: 2883: 2882: 2878: 2875: 2873: 2870: 2868: 2865: 2861: 2857: 2854: 2852: 2851: 2847: 2845: 2842: 2841: 2840: 2837: 2836: 2833: 2827: 2824: 2822: 2821: 2817: 2815: 2812: 2810: 2807: 2805: 2802: 2798: 2797: 2793: 2789: 2786: 2785: 2784: 2783: 2779: 2778: 2777: 2774: 2772: 2769: 2768: 2766: 2764: 2763: 2758: 2755: 2753: 2749: 2739: 2736: 2734: 2731: 2729: 2726: 2724: 2721: 2719: 2716: 2714: 2711: 2709: 2705: 2704:Invented here 2702: 2700: 2697: 2695: 2692: 2690: 2687: 2685: 2682: 2680: 2677: 2675: 2672: 2670: 2667: 2666: 2664: 2662: 2658: 2652: 2649: 2647: 2646: 2642: 2641: 2639: 2637: 2633: 2627: 2623: 2620: 2618: 2615: 2614: 2612: 2608: 2602: 2599: 2597: 2594: 2592: 2589: 2587: 2584: 2580: 2577: 2576: 2575: 2572: 2568: 2567: 2563: 2561: 2560: 2556: 2555: 2553: 2549: 2546: 2545: 2544: 2541: 2540: 2538: 2536: 2532: 2526: 2523: 2521: 2518: 2516: 2513: 2511: 2508: 2506: 2503: 2501: 2498: 2496: 2493: 2492: 2490: 2488: 2484: 2478: 2475: 2473: 2470: 2468: 2467:False analogy 2465: 2463: 2460: 2458: 2454: 2451: 2447: 2444: 2442: 2439: 2438: 2437: 2436:Sampling bias 2434: 2432: 2429: 2428: 2426: 2424: 2420: 2414: 2411: 2409: 2406: 2405: 2403: 2401: 2400: 2399:Secundum quid 2395: 2389: 2386: 2384: 2381: 2379: 2376: 2375: 2373: 2371: 2367: 2361: 2358: 2356: 2353: 2349: 2346: 2345: 2344: 2343:False dilemma 2341: 2340: 2338: 2336: 2332: 2326: 2323: 2321: 2317: 2313: 2310: 2306: 2303: 2302: 2301: 2298: 2296: 2292: 2289: 2288: 2286: 2282: 2276: 2273: 2271: 2268: 2266: 2263: 2261: 2258: 2256: 2253: 2251: 2248: 2246: 2243: 2242: 2240: 2236: 2233: 2231: 2227: 2217: 2214: 2212: 2211:Illicit minor 2209: 2207: 2206:Illicit major 2204: 2202: 2199: 2197: 2194: 2192: 2189: 2187: 2184: 2182: 2179: 2177: 2174: 2173: 2171: 2169: 2165: 2159: 2156: 2154: 2151: 2149: 2146: 2144: 2141: 2140: 2138: 2136: 2131: 2125: 2122: 2120: 2117: 2115: 2112: 2110: 2107: 2105: 2102: 2100: 2097: 2096: 2094: 2092: 2087: 2084: 2082: 2078: 2073: 2069: 2061: 2056: 2054: 2049: 2047: 2042: 2041: 2038: 2026: 2023: 2021: 2017: 2016: 2013: 2007: 2004: 2002: 1999: 1997: 1994: 1993: 1991: 1987: 1981: 1978: 1976: 1973: 1971: 1968: 1966: 1963: 1961: 1958: 1954: 1951: 1949: 1946: 1944: 1943:United States 1941: 1939: 1936: 1934: 1931: 1929: 1926: 1924: 1921: 1919: 1918:False balance 1916: 1915: 1914: 1911: 1909: 1906: 1904: 1901: 1899: 1896: 1894: 1891: 1889: 1886: 1884: 1881: 1879: 1876: 1874: 1873: 1869: 1867: 1864: 1862: 1859: 1858: 1856: 1852: 1846: 1843: 1841: 1838: 1836: 1833: 1831: 1828: 1826: 1823: 1821: 1818: 1816: 1813: 1811: 1808: 1806: 1803: 1801: 1798: 1796: 1793: 1791: 1790:Participation 1788: 1786: 1783: 1781: 1778: 1776: 1773: 1771: 1768: 1766: 1763: 1759: 1758:Psychological 1756: 1755: 1754: 1751: 1749: 1746: 1744: 1741: 1739: 1736: 1735: 1733: 1731: 1727: 1721: 1718: 1716: 1713: 1711: 1708: 1706: 1703: 1701: 1698: 1696: 1693: 1691: 1688: 1686: 1683: 1681: 1678: 1676: 1673: 1671: 1668: 1666: 1663: 1661: 1658: 1656: 1653: 1651: 1648: 1646: 1643: 1641: 1638: 1636: 1633: 1631: 1628: 1626: 1623: 1621: 1618: 1616: 1613: 1611: 1608: 1606: 1603: 1601: 1598: 1596: 1593: 1591: 1588: 1586: 1583: 1581: 1578: 1576: 1573: 1571: 1568: 1566: 1563: 1561: 1558: 1556: 1553: 1551: 1548: 1546: 1543: 1541: 1538: 1536: 1533: 1531: 1528: 1526: 1525:Fading affect 1523: 1521: 1518: 1516: 1513: 1509: 1506: 1505: 1504: 1501: 1499: 1496: 1494: 1491: 1489: 1486: 1484: 1481: 1479: 1476: 1474: 1471: 1467: 1464: 1463: 1462: 1459: 1457: 1454: 1452: 1449: 1447: 1444: 1442: 1439: 1435: 1432: 1431: 1430: 1427: 1425: 1422: 1420: 1417: 1413: 1410: 1408: 1405: 1404: 1403: 1400: 1398: 1395: 1393: 1390: 1388: 1385: 1383: 1380: 1378: 1375: 1374: 1372: 1369: 1364: 1360: 1353: 1348: 1346: 1341: 1339: 1334: 1333: 1330: 1319: 1315: 1311: 1307: 1303: 1299: 1292: 1283: 1278: 1273: 1268: 1264: 1260: 1256: 1249: 1241: 1237: 1233: 1226: 1218: 1214: 1209: 1204: 1199: 1194: 1190: 1186: 1182: 1178: 1174: 1167: 1152: 1148: 1147:"Gallup Poll" 1145:Lienhard JH. 1141: 1126: 1120: 1112: 1106: 1098: 1094: 1090: 1086: 1082: 1078: 1071: 1063: 1057: 1053: 1052: 1044: 1036: 1030: 1026: 1025: 1017: 1009: 1003: 999: 998: 990: 982: 978: 973: 968: 964: 960: 953: 946: 938: 934: 930: 924: 920: 916: 911: 906: 901: 896: 892: 888: 881: 874: 866: 862: 857: 852: 849:(2): 103–15. 848: 844: 840: 833: 817: 813: 809: 803: 787: 783: 779: 773: 754: 750: 746: 739: 732: 730: 718: 717: 709: 701: 695: 691: 687: 686: 678: 671: 660: 656: 650: 634: 630: 626: 620: 616: 606: 603: 601: 600:Spectrum bias 598: 596: 593: 591: 588: 586: 583: 581: 578: 576: 573: 571: 568: 566: 563: 561: 558: 557: 553: 547: 542: 535: 532: 526: 517: 515: 511: 507: 503: 498: 496: 492: 488: 484: 480: 476: 471: 469: 465: 462: 458: 454: 450: 446: 445: 440: 436: 431: 429: 425: 424:George Gallup 421: 417: 413: 409: 408: 399: 395: 390: 381: 379: 374: 372: 368: 364: 360: 355: 352: 348: 338: 336: 332: 328: 324: 314: 287: 283: 280: 276: 272: 269: 266: 263: 262: 261: 258: 256: 252: 248: 239: 230: 228: 224: 220: 206: 203: 202: 201: 196: 195: 191: 188: 187: 183: 180: 176: 175: 171: 168: 167:cholecystitis 164: 160: 159: 155: 152: 151: 147: 144: 139: 135: 132: 131: 127: 122: 118: 114: 113: 109: 106: 102: 101: 95: 92: 89: 85: 81: 77: 73: 63: 61: 56: 54: 49: 48:biased sample 45: 41: 37: 33: 32:sampling bias 29: 22: 3149: 3124: 2999:Naturalistic 2982: 2970: 2950: 2921: 2905:of relevance 2848: 2826:Whataboutism 2818: 2794: 2788:Godwin's law 2780: 2760: 2643: 2636:Consequences 2617:Law/Legality 2591:Single cause 2564: 2557: 2435: 2397: 2265:Loki's Wager 2245:Equivocation 2238:Equivocation 1903:In education 1870: 1854:Other biases 1840:Verification 1825:Survivorship 1799: 1775:Non-response 1748:Healthy user 1690:Substitution 1665:Self-serving 1461:Confirmation 1429:Availability 1377:Acquiescence 1304:(3): 19–33. 1301: 1297: 1291: 1262: 1258: 1248: 1231: 1225: 1183:(21): 6198. 1180: 1176: 1166: 1156:29 September 1154:. Retrieved 1150: 1140: 1129:. Retrieved 1119: 1105: 1080: 1076: 1070: 1050: 1043: 1023: 1016: 996: 989: 962: 958: 945: 890: 886: 873: 846: 842: 832: 822:23 September 820:. Retrieved 816:the original 811: 802: 790:. Retrieved 786:the original 781: 772: 760:. Retrieved 753:the original 744: 715: 708: 684: 677: 669: 664:23 September 662:. Retrieved 658: 649: 639:23 September 637:. Retrieved 633:the original 628: 619: 527: 523: 499: 495:correlations 472: 457:phone survey 442: 432: 405: 403: 375: 356: 344: 335:burial sites 320: 291: 285: 281: 274: 270: 264: 259: 255:heterozygote 244: 215: 204: 200: 192: 184: 174:Overmatching 172: 162: 156: 148: 133: 110: 104: 93: 75: 69: 59: 57: 47: 31: 25: 3019:Red herring 2776:Association 2457:Conjunction 2378:Composition 2275:Reification 2191:Existential 2143:Existential 1970:Publication 1923:Vietnam War 1770:Length time 1753:Information 1695:Time-saving 1555:Horn effect 1545:Halo effect 1493:Distinction 1402:Attribution 1397:Attentional 965:: 103–126. 792:14 November 762:14 November 475:air quality 461:Bell System 428:Gallup poll 367:fold change 323:prehistoric 275:individuals 223:comorbidity 3165:Categories 2995:Moralistic 2929:Sealioning 2923:Ad nauseam 2850:Ipse dixit 2762:Ad hominem 2586:Regression 2388:Ecological 2201:Four terms 2119:Masked man 1933:South Asia 1908:Liking gap 1720:In animals 1685:Status quo 1600:Negativity 1503:Egocentric 1478:Congruence 1456:Commitment 1446:Blind spot 1434:Mean world 1424:Automation 1131:2008-07-05 611:References 416:Alf Landon 179:confounder 40:population 28:statistics 3036:Straw man 2914:Arguments 2903:fallacies 2877:Tradition 2867:Etymology 2839:Authority 2820:Tu quoque 2804:Bulverism 2574:Gambler's 2543:Animistic 2487:Ambiguity 2453:Base rate 2196:Necessity 2068:fallacies 2001:Debiasing 1980:White hat 1975:Reporting 1888:Inductive 1805:Selection 1765:Lead time 1738:Estimator 1715:Zero-risk 1680:Spotlight 1660:Restraint 1650:Proximity 1635:Precision 1595:Narrative 1550:Hindsight 1535:Frequency 1515:Emotional 1488:Declinism 1419:Authority 1392:Anchoring 1382:Ambiguity 967:CiteSeerX 905:CiteSeerX 900:0805.2775 893:: 38–53. 357:The word 351:parameter 347:statistic 134:Exclusion 3062:Category 2694:Ridicule 2679:Flattery 2669:Children 2566:Post hoc 2446:McNamara 2408:Accident 2383:Division 2230:Informal 1898:Inherent 1861:Academic 1835:Systemic 1820:Spectrum 1800:Sampling 1780:Observer 1743:Forecast 1655:Response 1615:Optimism 1610:Omission 1605:Normalcy 1575:In-group 1570:Implicit 1483:Cultural 1387:Affinity 1318:11685550 1232:Preprint 1217:33143233 538:See also 512:and the 219:dyslexia 138:migrated 53:sampling 2881:Novelty 2856:Poverty 2718:Loyalty 2684:Novelty 2661:Emotion 2610:Appeals 2579:Inverse 2559:Cum hoc 2548:Furtive 2066:Common 2020:General 2018:Lists: 1953:Ukraine 1878:Funding 1640:Present 1625:Outcome 1530:Framing 1282:8127858 1208:7662848 1185:Bibcode 1177:Sensors 1097:2095230 865:9504213 331:middens 308:⁄ 298:⁄ 3129:(1954) 2966:ClichĂ© 2901:Other 2872:Nature 2860:Wealth 2495:Accent 2081:Formal 2025:Memory 1938:Sweden 1928:Norway 1795:Recall 1565:Impact 1441:Belief 1359:Biases 1316:  1279:  1215:  1205:  1095:  1058:  1031:  1004:  969:  937:842488 935:  925:  907:  863:  696:  286:family 2728:Spite 2622:Stone 1913:Media 1883:FUTON 1314:S2CID 1093:JSTOR 955:(PDF) 933:S2CID 895:arXiv 883:(PDF) 756:(PDF) 741:(PDF) 720:(PDF) 491:ozone 489:, or 398:Acid2 98:Types 34:is a 2814:Tone 2689:Pity 2674:Fear 2072:list 1213:PMID 1158:2007 1056:ISBN 1029:ISBN 1002:ISBN 923:ISBN 891:5254 861:PMID 824:2009 794:2009 764:2009 694:ISBN 666:2009 641:2009 359:bias 163:more 36:bias 2133:In 2089:In 1960:Net 1845:Wet 1306:doi 1277:PMC 1267:doi 1236:doi 1203:PMC 1193:doi 1085:doi 977:doi 963:519 915:doi 851:doi 690:180 473:In 373:). 303:or 26:In 3167:: 2997:/ 2879:/ 2858:/ 2706:/ 2624:/ 2455:/ 2318:/ 2314:/ 2293:/ 1312:. 1302:30 1300:. 1275:. 1263:36 1261:. 1257:. 1211:. 1201:. 1191:. 1181:20 1179:. 1175:. 1149:. 1091:. 1081:48 1079:. 975:. 961:. 957:. 931:. 921:. 913:. 903:. 885:. 859:. 847:22 845:. 841:. 810:. 780:. 743:. 728:^ 692:. 668:. 657:. 627:. 485:, 481:, 451:, 430:. 414:, 333:, 55:. 30:, 3141:" 3137:" 3096:e 3089:t 3082:v 2074:) 2070:( 2059:e 2052:t 2045:v 1351:e 1344:t 1337:v 1320:. 1308:: 1285:. 1269:: 1242:. 1238:: 1219:. 1195:: 1187:: 1160:. 1134:. 1099:. 1087:: 1064:. 1037:. 1010:. 983:. 979:: 939:. 917:: 897:: 867:. 853:: 826:. 796:. 766:. 702:. 643:. 310:8 306:5 300:7 296:4 23:.

Index

Spotlight effect
statistics
bias
population
sampling probability
sampling
selection bias
external validity
selection bias
internal validity
Self-selection
Non-response bias
human-subject research ethics
online and phone-in polls
migrated
selection bias
Healthy user bias
Berkson's fallacy
cholecystitis
Overmatching
confounder
Survivorship bias
Malmquist bias
dyslexia
comorbidity
intellectual disability

simple Mendelian
Mendelian inheritance
heterozygote

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