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ASTM E1885-25

Standard Test Method for Sensory Analysis—Triangle Test

Standard Test Method for Sensory Analysis—Triangle Test E1885-25 ASTM|E1885-25|en-US Standard Test Method for Sensory Analysis—Triangle Test Standard new BOS Vol. 14.03 Committee E18
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Significance and Use

5.1 The test method is effective for the following test objectives:

5.1.1 To determine if a perceptible difference results or if a perceptible difference does not result, for example, when a change is made in ingredients, processing, packaging, handling, or storage; or

5.1.2 To select, train, and monitor assessors.

5.2 The test method itself does not change whether the purpose of the test is to determine that the products are perceptibly different versus that the products are sufficiently similar to be used interchangeably. Only the selected values of α, β, and δ or Pd change. If the objective of the test is to determine if there is a perceptible difference between two products, then initially the products are assumed to be indistinguishable (for example, H0: δ or Pd = 0) and the data are examined to determine if the assumption can be rejected (that is, conclude that the products are perceptibly different). If the objective is to determine if the two products are sufficiently similar to be used interchangeably, then initially the products are assumed to be meaningfully different (for example, H0: δ or Pd > the value chosen to represent a meaningful difference) and the data are examined to determine if the assumption can be rejected (that is, conclude that the samples are sufficiently similar to be used interchangeably).

Scope

1.1 This test method covers a procedure for determining whether a perceptible sensory difference exists between samples of two products or to estimate the magnitude of the perceptible difference.

1.2 This test method applies whether a difference may exist in a single sensory attribute or in several.

1.3 This test method is applicable when the nature of the difference between the samples is unknown. The attribute(s) responsible for the difference are not identified.

1.4 The triangle test is more efficient statistically than the duo-trio test (Test Method E2610). For details on how the triangle test compares to other three-sample tests, see Refs (1-4).2

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.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Details
Book of Standards Volume: 14.03
Developed by Subcommittee: E18.04
Pages: 14
DOI: 10.1520/E1885-25
ICS Code: 67.240