Psychonomic Science

, Volume 3, Issue 1–12, pp 23–24 | Cite as

Stimulus aftereffects of bar pressing

  • J. M. Bloom
  • Nelson F. Smith
Animal Behavior


Rat Ss were trained in the free response bar-press apparatus under a single alternation pattern of partial reinforcement. After all Ss learned to respond at a low rate following reward and a high rate following non-reward, half were transferred to a double alternation pattern. The change did not affect the learned habits, and the results were interpreted as supporting the aftereffects hypothesis.


Pattern Learning Reward Condition Alternation Pattern Nonrewarded Trial Straight Runway 
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Copyright information

© Psychonomic Press 1965

Authors and Affiliations

  • J. M. Bloom
    • 1
  • Nelson F. Smith
    • 1
  1. 1.Princeton UniversityUSA

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