An analysis of stimulus control in two-color matching-to-sample behaviors of Japanese monkeys (<I>Macaca fuscata fuscata</I>)

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Matching behaviors of Japanese monkeys were analyzed. In Experiment 1, two subjects trained on a matching-to-sample task with red and purple. After acquisition, transfer of this were discrimination to yellow and yellowgreen was tested with "non-effective" trials inserted among baseline trials. In non-effective trials, intertrial interval immediately followed the subject's response without differential reinforcement. Although this procedure guaranteed stable responding during tests, matching accuracy severely deteriorated for these novel colors and marked preference for familiar baseline colors was observed. In Experiment 2, two new subjects were trained to discriminate between two of four colors (blue, bluegreen, yellowgreen, and yellow)before matching training with red and purple. After acquiring matching behavior, transfer to the four colors was tested with non-effective trials. Both subjects matched the two previously-trained test colors somewhat successfully, though the preference for baseline colors was not suppressed. Thus, evidence that the identity between sample and comparison stimuli controlled, at least partly, two-color matching-to-sample behaviors of Japanese monkeys was obtained after establishing the discrimination between the test stimuli.
公益社団法人日本心理学会の論文