Partial reinforcement in appetitive Pavlovian conditioning with rats


Pearce J., Redhead E., AYDIN A.

QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY SECTION B-COMPARATIVE AND PHYSIOLOGICAL PSYCHOLOGY, cilt.50, no.4, ss.273-294, 1997 (SCI İndekslerine Giren Dergi) identifier identifier identifier identifier

  • Cilt numarası: 50 Konu: 4
  • Basım Tarihi: 1997
  • Dergi Adı: QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY SECTION B-COMPARATIVE AND PHYSIOLOGICAL PSYCHOLOGY
  • Sayfa Sayıları: ss.273-294

Özet

Four experiments examined the effects of a partial reinforcement schedule on extinction using appetitive Pavlovian conditioning. Extinction was slower after partial than after continuous reinforcement when the schedules were administered to different groups (Experiment 1). The opposite result was found in Experiments 2 and 3 when both schedules were presented to the same group in the same context. When the schedules were presented to the. same group in different contexts, then extinction was again slower after partial reinforcement (Experiment 3). Experiment 4 demonstrated that a change of context facilitates extinction to a greater extent after conditioning with a partial reinforcement schedule than with a continuous one. The results are explained by assuming that the nonreinforced trials of a partial reinforcement schedule create an internal state that serves as a contextual cue.