Provides a procedure for determining whether a perceptible sensory difference or similarity exists between samples of two products. The method is applicable whether a difference exists in a single sensory attribute or in several attributes.
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 General test conditions and requirements
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
6 Assessors
6.1 Qualification
6.2 Number of assessors
7 Procedure
7.1
7.2
7.3
7.4
7.5
7.6
8 Analysis and interpretation of results
8.1 When testing for a difference
8.2 When testing for similarity1)
9 Test report
10 Precision and bias
Annex A
A.1
A.2
A.3
Annex B
B.1 Example 1: Duo-trio test to confirm that a difference exists — Balanced reference technique
B.1.1 Background
B.1.2 Test objective
B.1.3 Number of assessors
B.1.4 Conducting the test
B.1.5 Analysis and interpretation of results
B.1.6 Report and conclusions
B.2 Example 2: Duo-trio test to confirm that two samples are similar — Constant reference technique
B.2.1 Background
B.2.2 Test objective
B.2.3 Number of assessors
B.2.4 Conducting the test
B.2.5 Analysis and interpretation of results
B.3 Example 3: Confidence intervals for duo-trio tests
