Stimulus perseveration in discrimination learning by cats.

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Abstract
Cats were trained to a criterion of 20 out of 25 "on four problems of each of four different types: P+O, both object and position cues relevant; P, only position cues available; P-O, position relevant and object cues irrelevant; O-P, object cues relevant and position cues irrelevant." The initially preferred object or position was rewarded on 50% the problem, (+); on the remaining problems S had to learn to choose the initially nonpreferred, (-). "The difference between error scores on + and - problems was large and significant." Experimentally sophisticated cats made "significantly fewer errors on P than on P+O or P-O problems." The conclusion was that "stimulus perseveration seriously retards the solution of positional as well as object discriminations by cats, and that the more rapid solution of P problems resulted from the unique stimulus configuration occurring on these problems." From Psyc Abstracts 36:01:1EJ99W. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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