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ASTM E 2164 : 2016

Current
Current

The latest, up-to-date edition.

Standard Test Method for Directional Difference Test
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-01-2016

This test method covers a procedure for comparing two products using a two-alternative forced-choice task.

1.1This test method covers a procedure for comparing two products using a two-alternative forced-choice task.

1.2This method is sometimes referred to as a paired comparison test or as a 2-AFC (alternative forced choice) test.

1.3A directional difference test determines whether a difference exists in the perceived intensity of a specified sensory attribute between two samples.

1.4Directional difference testing is limited in its application to a specified sensory attribute and does not directly determine the magnitude of the difference for that specific attribute. Assessors must be able to recognize and understand the specified attribute. A lack of difference in the specified attribute does not imply that no overall difference exists.

1.5This test method does not address preference.

1.6A directional difference test is a simple task for assessors, and is used when sensory fatigue or carryover is a concern. The directional difference test does not exhibit the same level of fatigue, carryover, or adaptation as multiple sample tests such as triangle or duo-trio tests. For detail on comparisons among the various difference tests, see Ennis (1), MacRae (2), and O'Mahony and Odbert (3).2

1.7The procedure of the test described in this document consists of presenting a single pair of samples to the assessors.

1.8This 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 and health practices and determine the applicability of regulatory limitations prior to use.

Committee
E 18
DocumentType
Test Method
Pages
11
PublisherName
American Society for Testing and Materials
Status
Current
Supersedes

ASTM E 2262 : 2003 : R2014 Standard Practice for Estimating Thurstonian Discriminal Distances
ASTM E 460 : 2012 Standard Practice for Determining Effect of Packaging on Food and Beverage Products During Storage
ASTM E 3093 : 2019 Standard Guide for Structured Small Group Product Evaluations
ASTM E 1958 : 2019 Standard Guide for Sensory Claim Substantiation
ASTM E 2263 : 2012 : R2018 Standard Test Method for Paired Preference Test
ASTM D 5237 : 2014 : R2019 Standard Guide for Evaluating Fabric Softeners

ASTM E 253 : 2023 : REV A Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 1871 : 2017 Standard Guide for Serving Protocol for Sensory Evaluation of Foods and Beverages
ASTM E 253 : 2020 : REV A Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 456 : 2002 Standard Terminology for Relating to Quality and Statistics
ASTM E 456 : 2013 : REV A : R2022 Standard Terminology Relating to Quality and Statistics
ASTM E 1871 : 2006 Standard Guide for Serving Protocol for Sensory Evaluation of Foods and Beverages
ASTM E 1871 : 1997 Standard Practice for Serving Protocol for Sensory Evaluation of Foods and Beverages
ASTM E 456 : 2013 : REV A : R2017 : EDT 5 Standard Terminology Relating to Quality and Statistics
ASTM E 1871 : 2010 Standard Guide for Serving Protocol for Sensory Evaluation of Foods and Beverages
ASTM E 253 : 2021 Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 253 : 2022 Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 253 : 2021 : REV A Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 253 : 2023 Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 253 : 2022 : REV A Standard Terminology Relating to Sensory Evaluation of Materials and Products
ASTM E 1871 : 1997 : R2004 Standard Practice for Serving Protocol for Sensory Evaluation of Foods and Beverages
ASTM E 456 : 2013 : REV A : R2017 : EDT 4 Standard Terminology Relating to Quality and Statistics
ASTM E 456 : 2013 : REV A : R2017 : EDT 6 Standard Terminology Relating to Quality and Statistics

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