Open AccessTetrad vs. triangle test: A case study with Brazilian guarana soft drink
Author(s) -
Kamila Ferreira Chaves,
Adriana Lúcia Wahanik,
Michelly Cristiane Paludo,
Bianca Iarossi Toledo,
Alexandre Montagnana Vicente Leme,
Alessandro Antonio Orelli,
Jorge Herman Behrens
Publication year - 2020
Publication title -
research, society and development
Language(s) - English
Resource type - Journals
ISSN - 2525-3409
DOI - 10.33448/rsd-v9i4.3049
Subject(s) - tetrad , significant difference , mathematics , statistics , chemistry , psychology , mathematical physics
Discrimination sensory tests aim to identify if a difference between two similar stimuli is detected. In this study we compared the efficacy of Tetrads and Triangle tests in the difference detection between two samples of guarana soft drink, by means of the calculation of proportion of discriminators and thurstonian distance. Evaluated samples were produced by different syrup clarification methods (activated carbon and ionic exchange column). For each test 99 testers were used; Triangle test evaluated three samples, while Tetrad four samples, in complete randomized blocks. Only Tetrad test was able to detect significant difference between the samples (p<0.05), with a low proportion of discriminators and thurstonian distance inferior to perception limit, demonstrating that Tetrad test is more powerful and sensible than Triangle test.