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UNDERSTANDING DISCRIMINATION TESTS: A USER-FRIENDLY TREATMENT OF RESPONSE BIAS, RATING AND RANKING R-INDEX TESTS AND THEIR RELATIONSHIP TO SIGNAL DETECTION
Article first published online: 5 MAY 2007
Journal of Sensory Studies
Volume 7, Issue 1, pages 1–47, March 1992
How to Cite
O'MAHONY, M. (1992), UNDERSTANDING DISCRIMINATION TESTS: A USER-FRIENDLY TREATMENT OF RESPONSE BIAS, RATING AND RANKING R-INDEX TESTS AND THEIR RELATIONSHIP TO SIGNAL DETECTION. Journal of Sensory Studies, 7: 1–47. doi: 10.1111/j.1745-459X.1992.tb00519.x
- Issue published online: 5 MAY 2007
- Article first published online: 5 MAY 2007
Aproblem central to sensory difference testing is response bias. There are two experimental strategies for dealing with this problem. The first is to use forced choice procedures, like the common duo-trio or triangle tests, while the second is to use signal detection measures like d′, P(A) and the R-index. These strategies are explained and discussed. The relationship between the R-index and the other signal detection measures is explained. The relationship between R-index values obtained by rating and ranking is explored, as are the alternative computations of the R-index by ranking: Rjb and Rmat.