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Related Experiment Videos

Behavioral variability and frequency-dependent selection.

A Machado1

  • 1Department of Psychology, Duke University, Durham, North Carolina 27706.

Journal of the Experimental Analysis of Behavior
|September 1, 1992
PubMed
Summary
This summary is machine-generated.

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Pigeons exhibit random behavior when a variability schedule is introduced, but develop stereotyped patterns when reinforcement probability is constant. Frequency-dependent selection can lead to random behavior if stable patterns are not acquired.

Area of Science:

  • Behavioral psychology
  • Animal behavior studies
  • Operant conditioning

Background:

  • Variability in behavior is crucial for adaptation and exploration.
  • Understanding the mechanisms driving behavioral variability is key to behavioral science.
  • Frequency-dependent selection is a proposed mechanism for generating behavioral variability.

Purpose of the Study:

  • To investigate the role of frequency-dependent selection in generating behavioral variability in pigeons.
  • To compare random responding under a variability schedule with stereotyped behavior under a control condition.
  • To determine conditions under which pigeons fail to acquire stable stereotyped behaviors under frequency-dependent selection.

Main Methods:

  • Experiment 1: Compared a variability schedule with a constant reinforcement probability control.

Related Experiment Videos

  • Experiments 2 & 3: Applied frequency-dependent selection to single and double peck sequences.
  • Utilized operant conditioning chambers with pigeons as subjects.

    • Main Results:

    • Pigeons showed random responding under the variability schedule but stereotyped behavior in the control condition.
    • Pigeons alternated single pecks under frequency-dependent selection, a stable pattern.
    • Two out of four pigeons displayed random behavior when frequency-dependent selection was applied to two-peck sequences.

    Conclusions:

    • Behavioral variability can arise from frequency-dependent selection, favoring infrequent patterns.
    • The ability to acquire stable, stereotyped behaviors is critical for frequency-dependent selection to reduce variability.
    • Failure to acquire such stable patterns can result in persistent random behavior.