ASTM E1697 - 05(2020) - Standard Test Method for Unipolar Magnitude Estimation of Sensory Attributes

ASTM E1697 - 05(2020)

Standard Test Method for Unipolar Magnitude Estimation of Sensory Attributes

Status : Current   Published : February 2020



1.1 This test method describes a procedure for the application of unipolar magnitude estimation to the evaluation of the magnitude of sensory attributes. The test method covers procedures for the training of assessors to produce magnitude estimations and statistical evaluation of the estimations.

1.2 Magnitude estimation is a psychophysical scaling technique in which assessors assign numeric values to the magnitude of an attribute. The only constraint placed upon the assessor is that the values assigned should conform to a ratio principle. For example, if the attribute seems twice as strong in sample B when compared to sample A, sample B should receive a value which is twice the value assigned to sample A.

1.3 The intensity of attributes such as pleasantness, sweetness, saltiness or softness can be evaluated using magnitude estimation.

1.4 Magnitude estimation may provide advantages over other scaling methods, particularly when the number of assessors and the time available for training are limited. With approximately 1 h of training, a panel of 15 to 20 naive individuals can produce data of adequate precision and reproducibility. Any additional training that may be required to ensure that the assessors can properly identify the attribute being evaluated is beyond the scope of this test method.

1.5  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.

Standard NumberASTM E1697 - 05(2020)
TitleStandard Test Method for Unipolar Magnitude Estimation of Sensory Attributes
Publication Date01 February 2020
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors agricultural products, beverages, color, estimation, feel, food products, magnitude estimation, odor or water pollution, odors, perfumes, scaling, sensory analysis, sound, taste, tobacco
File Size112 KB

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