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Related Experiment Videos

Satiation causes within-session decreases in instrumental responding

L A Bizo1, S V Bogdanov, P R Killeen

  • 1Department of Psychology, Arizona State University 85287-1104, USA. lewisb@psy.soton.ac.uk or to killeen@asu.edu

Journal of Experimental Psychology. Animal Behavior Processes
|November 7, 1998
PubMed
Summary

Satiation, not just extreme food amounts, causes decreased responding in pigeons. This effect on behavior is influenced by reinforcer duration and grain size, impacting overall food intake.

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Area of Science:

  • Behavioral science
  • Animal behavior

Background:

  • Within-session response rates in animals often peak early and decline later.
  • The factors driving this decline, particularly related to food intake, require further investigation.

Purpose of the Study:

  • To determine the amount of food needed to cause within-session decreases in response rates.
  • To examine the influence of reinforcer duration and grain size on food intake and response rates.

Main Methods:

  • Experiments involved pigeons responding for food.
  • Reinforcer duration and grain size were systematically varied.
  • Food intake and response rates were measured throughout the session.

Main Results:

  • Larger food amounts led to greater decreases in response rates within a session.

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  • Pigeons that consumed less food freely showed the most significant decreases in responding.
  • The observed decreases were linked to satiation, not solely extreme food manipulations.

    • Conclusions:

    • Satiation is the primary cause of within-session decreases in response rates.
    • This effect is observable even with moderate food consumption, not just extreme amounts.
    • Findings contribute to understanding behavioral regulation of food intake.