6533b85ffe1ef96bd12c13e4
RESEARCH PRODUCT
Application of replicated difference testing
Catherine DacremontPascal SchlichPer B. Brockhoffsubject
2. Zero hunger0303 health sciencesNutrition and Dietetics030309 nutrition & dieteticsdifference testNon alcoholic04 agricultural and veterinary sciences[SDV.IDA] Life Sciences [q-bio]/Food engineering040401 food scienceSensory analysis03 medical and health sciences0404 agricultural biotechnology[SDV.IDA]Life Sciences [q-bio]/Food engineeringStatisticsreplicationsEconometricsStatistical analysisPsychologyFood Sciencedescription
International audience; In a recent paper, Brockho and Schlich (1998, Handling replications in discrimination tests. Food Quality and Preference, 9(5), 303±312) proposed a statistically sound way of handling replications in dierence testing. In the present paper, this new test is applied to the data obtained in six experiments on non alcoholic beverages, where triangle tests were intensively replicated (between eight and 60 times) with groups of subjects composed of 12±61 students. The paper aims to estimate in these practical situations the extent to which a group of panelists is heterogeneous towards the ability of detecting a sensory dierence among two products. As the results indicate that group heterogeneity was lower than Brockho and Schlich ®rst guessed, the value of using replicates in dierence testing is emphasized. It seems that, average over experiments, at least 10 replicates were necessary to properly estimate the level of heterogeneity and that a single subject having done 10 replicates would bring to our test the same amount of informa- tion as ®ve subjects having done the test once only.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-01-01 | Food Quality and Preference |