1. Scope
1.1 These test methods cover two procedures for determining whether a perceptible sensory difference exists between samples of two products. 1.2 Specified and unspecified methods are described. 1.3 The specified method applies when a difference exists in the perceived intensity of a specified sensory attribute between two samples. 1.4 The unspecified method applies whether a difference may exist in a single sensory attribute or in several. It does not determine the size or the direction of the difference. The attribute(s) responsible for the difference are not identified. 1.5 This test method is applicable only if the products are homogeneous. If two samples of the same product can often be distinguished, then another method, for example, descriptive analysis, may be more appropriate. 1.6 This test method is applicable only when the products do not cause excessive sensory fatigue, carryover or adaptation.
Keywords
Tetrad Test
The title and scope are in draft form and are under development within this ASTM Committee.
Citing ASTM Standards
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