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Irrelevant Stimuli and Action Control: Analyzing the Influence of Ignored Stimuli via the Distractor-Response Binding Paradigm
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Divided stimulus control depends on differential and nondifferential reinforcement: Testing a quantitative model.

Stephanie Gomes-Ng1,2, Sarah Cowie2, Douglas Elliffe2

  • 1Auckland University of Technology, Auckland, New Zealand.

Journal of the Experimental Analysis of Behavior
|August 15, 2023
PubMed
Summary

Reinforcers for errors altered stimulus control in pigeons, shifting focus between stimulus dimensions. This challenges the idea of purely dimensional control, suggesting reinforcer ratios play a key role.

Keywords:
conditional discriminationdivided controlpigeonreinforcement for errorsreinforcer rate

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Area of Science:

  • Behavioral psychology
  • Animal cognition
  • Stimulus control

Background:

  • Understanding how animals process complex stimuli is crucial for behavioral science.
  • Previous models of stimulus control did not fully account for error reinforcement or signaled dimensions.

Purpose of the Study:

  • To investigate the impact of differential and nondifferential reinforcers on divided stimulus control.
  • To test the applicability of Davison and Nevin's (1999) quantitative model under varied reinforcement conditions.

Main Methods:

  • Six pigeons were trained using a delayed matching-to-sample procedure.
  • Stimuli varied in color and alternation rate; pigeons reported either color or rate.
  • Reinforcer probabilities for correct and incorrect responses were manipulated across conditions.

Main Results:

  • Reinforcer ratios for correct and incorrect responses influenced choice behavior.
  • Increased error reinforcement for a specific dimension decreased control by that dimension.
  • Davison and Nevin's model fit data best when the reporting dimension was unsignaled.

Conclusions:

  • Reinforcer ratios significantly impact divided stimulus control, potentially overriding dimensional control.
  • The quantitative model's fit decreased when the reporting dimension was signaled, suggesting complex interactions.
  • Further research is needed to validate the model's generality and explore joint control by stimuli and reinforcers.