, Volume 17, Issue 1, pp 53–62 | Cite as

Some effects of a discrete trial procedure on differentiation learning by Japanese monkeys

  • Toshio Asano


Employing newly developed equipment, which permitted presentation of discriminative stimuli and the response manipulandum separately, the present study reexamined the results ofMcClearn's (1957) study on differentiation learning. When a discrete trial procedure analogous toMcClearn's was used, the subjects (two Japanese monkeys;Macaca fuscata fuscata) persisted in responding on S- trials, replicatingMcClearn's results. However, when a free operant procedure was used, in which the response manipulandum was continually available, the subjects made few responses during S- trials and showed almost complete differentiation. It was concluded that the discrete presentation of the manipulandum itself has some obstructive effects on differentiation, or successive discrimination learning.


Operant Procedure Animal Ecology Discriminative Stimulus Discrimination Learning Differentiation Learning 
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Copyright information

© Japan Monkey Centre 1976

Authors and Affiliations

  • Toshio Asano
    • 1
  1. 1.Department of Psychology, Primate Research InstituteKyoto UniversityInuyama-shi, Aichi-kenJapan

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