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using this research approach is in the form of numbers and statistics. In the article entitled, “An
Analysis of the Strengths and Limitations of Qualitative and Quantitative Research Paradigms”, author Atieno (2009), suggests, “quantitative research paradigm…is empirical in nature; it is also known as the scientific research paradigm” . This research process includes a method of deductive reasoning by use of measurable tools to collect relevant data. Quantitative research then results in precise measurements.
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Many researchers view quantitative research design as the best approach to scientific research because it offers precise measurement and analysis. In quantitative research design the researcher will count and classify, and build statistical models to then explain what is observed. Data collected
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approach that uses descriptive panels to measure a product's sensory characteristics. Panel members use their senses to identify perceived similarities and differences in products, and articulate those perceptions in their own words. Sensory evaluation is a science that measures, analyzes, and
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Tragon QDA is a registered trademark with the United States Patent and
Trademark Office. The term was coined by Herbert Stone (a food scientist) and Joel L. Sidel (a psychologist) in 1974 while at the Stanford Research Institute, (now known as
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The subjects, not the researchers, formulate the descriptions in their own terms of the sensory attributes under study. For example, subjects may be asked to rate a mineral supplement in terms of its "bitterness" rather than its
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Responses are often graphically implemented (n order to avert biases associated with some numbers) and are subsequently transformed to numerical assessments, such as on a scale of 0 - 60 or 0 - 100.
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QDA is a behavioral approach that uses descriptive panels to measure a product's sensory characteristics. The key aspects of the methodology of Stone and Sidel are:
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Products are presented for evaluation multiple times by the subjects. Replication allows for
Analysis of Variation (ANOVA) to establish subject performance.
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Originally developed within the food industry, QDA is the basis of many disciplines that involve the senses, such as clothing, cosmetics, and electronics.
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Quantitative, not qualitative, assessments are made. Subjective descriptions such as "like", "dislike", good", or "bad" are irrelevant.
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Stone, H., Sidel, J., Oliver, S., Woolsey, A., and
Singleton, R. C., (1974). Sensory evaluation by quantitative descriptive analysis.
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Ochieng, P. A. (2009), An
Analysis of the Strengths and Limitation of Qualitative and Quantitative Research Paradigms,
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33:) to products. It is a people science; i.e., people are essential to obtain information about products.
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interprets the reactions of the senses of sight, smell, sound, taste, and texture (or
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are used. Relative assessments are more important than absolute assessments.
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Data are collected from subjects without discussion among the subjects.
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Subjects are consumers who are moderate to heavy users of the product.
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41:). Stone and Sidel later founded Tragon Corporation, a successful
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Panels are a small number (e.g., 8 - 15) of experienced subjects.
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Manual on
Descriptive Analysis Testing for Sensory Evaluation
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Pearson
Product-Moment Correlation Coefficient (PPMNN or PMC)
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Subjects are screened for sensitivity to product differences.
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Stone, Herbert; Bleibaum, Rebecca; Thomas, Heather (2012).
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61:Key aspects of Quantitative Descriptive Analysis
162:Problems of Education in the 21st Century
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22:Quantitative Descriptive Analysis (QDA)
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116:Duncan's New Multiple Range Test (MRT)
52:Quantitative vs. qualitative research
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203:Sensory Evaluation Practices
111:Analysis of Variance (ANOVA)
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182:Hootman, Robert C. (1992).
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237:Northland Sensory Insights
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