An area theorem for the same-different experiment. |
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Authors: | R J Irwin M J Hautus J C Butcher |
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Affiliation: | Department of Psychology, University of Auckland, New Zealand. j.irwin@auckland.ac.nz |
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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. |
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