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A COMPARISON OF TWO PSYCHOPHYSICAL METHODS USING ANIMALS 1
Author(s) -
Moskowitz Herbert,
Kitzes Leonard
Publication year - 1966
Publication title -
journal of the experimental analysis of behavior
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.75
H-Index - 61
eISSN - 1938-3711
pISSN - 0022-5002
DOI - 10.1901/jeab.1966.9-515
Subject(s) - brightness , stimulus (psychology) , correctness , block (permutation group theory) , mathematics , artificial intelligence , computer science , optics , computer vision , pattern recognition (psychology) , algorithm , physics , psychology , geometry , cognitive psychology
A discrimination box containing two levers with a light above each was used to train eight rats to press beneath the brighter light for a milk reinforcer. The brighter light was held constant and the comparison light was varied to produce 12 brightness differences. The animals were run under two experimental methods: the block method in which each brightness level comparison was presented for a block of 11 contiguous trials, and the staircase method in which the sequence of brightness comparisons was determined by the correctness of the response on the preceding comparison. The block method produced a smaller differential brightness threshold and a larger change in discrimination performance for stimulus magnitude changes than did the staircase method.