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Getting value out of your sensory testing - the difference from control test

Nottingham, S.M. and Bell, G.E. and Reid, C.E. and Gore, C.J. (2004) Getting value out of your sensory testing - the difference from control test. In: 37th Annual AIFST Convention & Exhibition, 25 - 28 July 2004, Brisbane Convention & Exhibition Centre Brisbane, Australia. (Unpublished)

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Publisher URL: http://www.aifst.asn.au

Abstract

Non-parametric difference tests such as triangle and duo-trio tests traditionally are used to establish differences or similarities between products. However they only supply the researcher with partial answers and often further testing is required to establish the nature, size and direction of differences.

This paper looks at the advantages of the difference from control (DFC) test (also known as degree of difference test) and discusses appropriate applications of the test. The scope and principle of the test, panel composition and analysis of results are presented with the aid of suitable examples. Two of the major uses of the DFC test are in quality control and shelf-life testing. The role DFC takes in these areas and the use of other tests to complement the testing is discussed. Controls or standards are important in both these areas and the use of standard products, mental and written standards and blind controls are highlighted.

The DFC test has applications in products where the duo-trio and triangle tests cannot be used because of the normal heterogeneity of the product. While the DFC test is a simple difference test it can be structured to give the researcher more valuable data and scope to make informed decisions about their product.

Item Type:Conference or Workshop Item (Paper)
Additional Information:© The State of Queensland. Department of Primary Industries & Fisheries, 2004. Copyright protects this publication. Except for purposes permitted by the Copyright Act 1968, reproduction by whatever means is prohibited without prior written permission of the Department of Primary Industries & Fisheries, Queensland. Permission given by author S.M. Nottingham.
Keywords:Sensory testing; DFC test; quality control; shelf life testing.
Subjects:Science > Science (General)
Deposited On:02 Aug 2005
Last Modified:21 Apr 2011 01:54

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