Previous experiments have shown that the same-different test, because of its more suitable cognitive strategy and lower memory requirements, is a more powerful and sensitive alternative to the triangle and duo-trio tests. This project describes an experiment conducted in order to investigate ways to improve further the performance of the same-different test. Three protocols were compared using orange flavored beverages and 24 judges: the same-different method, the triangle test and the dual-pair paradigm. The latter protocol could improve the same-different's performance by preventing the spontaneous variations of the judges' T criterion. While no significant differences were detected among the d' values obtained with each procedure, a trend was observed for the same-different and dual-pair test to be slightly more sensitive (higher d' values) than the triangle test. Since the same-different test is statistically more powerful, it is a preferable choice over the triangle, duo-trio and dual-pair tests.
This article appears as:
Rousseau, B. and O'Mahony, M. (2001). Investigation of the dual-pair method as a possible alternative to the triangle and same-different tests. Journal of Sensory Studies, 16(2), 161-178.
Colleagues can request this journal article here:
Investigation of the dual-pair method as a possible alternative to the triangle and same-different tests
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