Search results for "Difference test"
showing 4 items of 4 documents
A comparison between nine laboratories performing triangle tests
2012
WOS: 000299451400001; International audience; Fifteen groups of participants in nine laboratories performed triangle tests with two pairs of soft drinks. Groups differed in practice level with triangle tests: eight groups of 60 consumers who were not used to triangle test, three groups of qualified assessors who have already performed a few triangle tests, and four groups of trained assessors with a more extensive practice of triangle tests; qualified and trained groups included 9 or 18 assessors. The soft drinks were made from syrups at two levels of dilution in order to achieve about 55% of correct responses to test for difference and about 40% of correct responses to test for similarity.…
Application of replicated difference testing
2000
International audience; In a recent paper, Brockho and Schlich (1998, Handling replications in discrimination tests. Food Quality and Preference, 9(5), 303±312) proposed a statistically sound way of handling replications in dierence testing. In the present paper, this new test is applied to the data obtained in six experiments on non alcoholic beverages, where triangle tests were intensively replicated (between eight and 60 times) with groups of subjects composed of 12±61 students. The paper aims to estimate in these practical situations the extent to which a group of panelists is heterogeneous towards the ability of detecting a sensory dierence among two products. As the results indicat…
Evaluation sensorielle. Actia. Guide de bonnes pratiques
2014
Complete work aimed at the users of the research; absent
Difference testing: Methods and appropriate use
2010
National audience; Difference tests are some of the most common methods employed in sensory evaluation of food and beverages. The objective of difference tests is basically to determine whether a difference exists between two products. There are many different types of test, such as the duo-trio test, the triangle test, the same-different test and the A-not A test. These tests, with their strengths and weaknesses, will be presented briefly during the talk. Whatever the test employed, some basic principles must be respected, e.g. sample coding with three digit numbers, and sample presentation in a balanced order. In some instances the tests must be restricted to one sensory modality. In such…