scope:

This International Standard provides guidance on: - obtaining data on the detection of chemical stimuli that evoke responses to odour, flavour and taste by a 3-AFC (three-alternative forced-choice) procedure; - the processing of the data to estimate the value of a threshold and its error bounds, and other statistics related to the detection of the stimulus. Typically, the procedures will be used in one of the following two modes: - investigation of the sensitivity of assessors to specific stimuli; - investigation of the ability of a chemical substance to stimulate the chemoreceptive senses.