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Sensory difference testing: The problem of overdispersion and the use of beta binomial statistical analysis

Title
Sensory difference testing: The problem of overdispersion and the use of beta binomial statistical analysis
Authors
Lee, Hye-SeongO'Mahony, Michael
Ewha Authors
이혜성
SCOPUS Author ID
이혜성scopus
Issue Date
2006
Journal Title
FOOD SCIENCE AND BIOTECHNOLOGY
ISSN
1226-7708JCR Link
Citation
vol. 15, no. 4, pp. 494 - 498
Keywords
sensory evaluationsensory difference testsbinomial statisticsoverdispersionbeta binomial testgamma
Publisher
KOREAN SOC FOOD SCIENCE TECHNOLOGY
Indexed
SCIE; SCOPUS; KCI WOS
Abstract
An increase in variance (overdispersion) can occur when a binomial statistical analysis is applied to sensory difference test data in which replicate sensory evaluations (tastings) and multiple evaluators (judges) are combined to increase the sample size. Such a practice can cause extensive Type I errors, leading to serious misinterpretations of the data, especially when traditional simple binomial analysis is applied. Alternatively, the use of beta binomial analysis will circumvent the problem of overdispersion. This brief review discusses the uses and computation methodology of beta binomial analysis and in practice evidence for the occurrence of overdispersion.
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엘텍공과대학 > 식품공학전공 > Journal papers
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