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Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats
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Choice among two and three alternatives.

Emma Beeby1, Brent Alsop1

  • 1Department of Psychology, University of Otago, Dunedin, New Zealand.

Journal of the Experimental Analysis of Behavior
|May 19, 2017
PubMed
Summary
This summary is machine-generated.

The number of choices did not impact pigeons' relative response rates between options. However, preference for certain options shifted depending on whether changeover responding was included or excluded, challenging existing choice behavior theories.

Keywords:
Choiceconcurrent schedulesconstant-ratio rulemultiple alternativespigeon

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Area of Science:

  • Behavioral science
  • Comparative psychology

Background:

  • Choice behavior research traditionally focuses on two alternatives.
  • Limited research exists on choice behavior with multiple alternatives.
  • Existing models predict number of alternatives doesn't affect relative allocation, but recent findings challenge this.

Purpose of the Study:

  • To investigate choice behavior with multiple (three) concurrent alternatives.
  • To compare choice behavior when two versus three alternatives are available.
  • To test predictions of choice models regarding the number of alternatives.

Main Methods:

  • Five pigeons were trained on concurrent schedules of reinforcement.
  • Relative reinforcement rates were set at 9:3:1 across alternatives.
  • Choice behavior was observed under two-key and three-key conditions.

Main Results:

  • The number of available alternatives (two vs. three) did not significantly alter relative response rates between pairs of alternatives.
  • Preference for lower-rate alternatives (3:1) was more extreme in some conditions.
  • Excluding changeover responding reversed preference patterns in three-alternative conditions.

Conclusions:

  • Findings challenge established theories of choice behavior.
  • The number of alternatives may not affect relative response allocation as predicted by some models.
  • Changeover responding can influence preference patterns in multi-alternative choice.