• There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

ASTM E 2164 : 2001 : R2007

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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

Hardcopy , PDF

Superseded date

09-04-2019

Language(s)

English

Published date

01-09-2007

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

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

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

1.4 Directional 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.

1.5 This test method does not address preference.

1.6 A 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 referencess. (1), (2), and (3).

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

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

Committee
E 18
DocumentType
Test Method
Pages
11
ProductNote
Reconfirmed 2007
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM E 3093 : 2019 Standard Guide for Structured Small Group Product Evaluations
ASTM E 1958 : 2019 Standard Guide for Sensory Claim Substantiation
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

View more information
£69.29
Excluding VAT

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.