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Percept Psychophys. 1999 May;61(4):766-9.

An area theorem for the same-different experiment.

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  • 1Department of Psychology, University of Auckland, New Zealand. j.irwin@auckland.ac.nz

Abstract

If observers in a same-different experiment base their decisions on the absolute difference between observations on a trial, the area under the receiver operating characteristic equals the maximum proportion of correct decisions that an unbiased independent-observations observer could attain. Even though the differencing strategy is suboptimal, the area measure yields an index of optimal performance.

PMID:
10370342
[PubMed - indexed for MEDLINE]
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