A comparison of methods for monitoring individual performances in taste selection tests

CALVIÑO, A.M.; GARRIDO, D.; DRUNDAY, F.; TAMASI, O.

JOURNAL OF SENSORY STUDIES

Blackwell Publishing

Año: 2005 vol. 20 p. 301 - 312

0887-8250

The evaluation of panel performance was made by three methods: average of correct responses (A), comparison of distances of individual standardized judgments to the average standardized responses (D) and a principal components analysis (PCA). Thirty assessors identified water and basic tastes and discriminated different sweet stimuli in neutral or acidified vehicles using R-index rating and ranking tests. By A and D methods 22 assessors were qualified as proficient. Composition of both panels were identical except for one judge. The output from PCA provided a graphical representation of the performance of the assessors and retained different subsets of 24 26 panelists for different proposals as discrimination of sweetness in acidified beverages; recognition of bitterness, sourness and discrimination of slight sweetness or evaluation of saltiness.