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ASTM-E2139:2011 Edition

ASTM-E2139:2011 Edition

$44.96

E2139-05(2011) Standard Test Method for Same-Different Test

Published By Publication Date Number of Pages
ASTM 2011 12
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1.1 This test method describes a procedure for comparing two products.

1.2 This test method does not describe the Thurstonian modeling approach to this test.

1.3 This test method is sometimes referred to as the simple-difference test.

1.4 A same-different test determines whether two products are perceived to be the same or different overall.

1.5 The procedure of the test described in this test method consists of presenting a single pair of samples to each assessor. The presentation of multiple pairs would require different statistical treatment and it is outside of the scope of this test method.

1.6 This test method is not attribute-specific, unlike the directional difference test.

1.7 This test method is not intended to determine the magnitude of the difference; however, statistical methods may be used to estimate the size of the difference.

1.8 This test method may be chosen over the triangle or duo-trio tests where sensory fatigue or carry-over are a concern, or where a simpler task is needed.

1.9 This standard may involve hazardous materials, operations, and equipment. 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Test Method
Significance and Use
Apparatus
Definition of Hypotheses
Assessors
Number of Assessors
3 Procedure
Analysis and Interpretation of Results
4 Report
Precision and Bias
Keywords
A1. NUMBER OF ASSESSORS REQUIRED FOR THE SAME-DIFFERENT TEST
A1.1
TABLE 1
5 TABLE A1.1
9 X1. SAME-DIFFERENT TEST FOR DIFFERENCE: TESTING FOR DIFFERENCES BETWEEN TWO FORMULATIONS OF LEMONADES
X1.1 Background
X1.2 Objective
X1.3 Number of Assessors
X1.4 Test Procedure
X1.5 Analysis and Interpretation of Results
TABLE X1.1
10 X1.6 Report and Conclusions
X2. SAME-DIFFERENT TEST FOR SIMILARITY: APPROVAL OF AN ALTERNATE VENDOR FOR A LIQUEUR INGREDIENT
X2.1 Background
X2.2 Objective
11 X2.3 Number of Assessors
X2.4 Test Procedure
X2.5 Analysis and Interpretation of Results
X2.6 Report and Conclusions
FIG. X2.1
12 REFERENCES
FIG. X2.2

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