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Choice and terminal-link response topography.

Journal of the Experimental Analysis of Behavior

|March 1, 1989

Summary

Pigeons showed a preference for pecking over treadling in concurrent-chains schedules, especially when pecking led to shorter delays to reinforcement. This suggests response topography influences choice behavior.

Area of Science:

Behavioral Psychology
Animal Behavior
Operant Conditioning

Background:

Concurrent-chains schedules are used to study choice behavior in animals.
Previous research suggests pigeons may prefer certain response topographies over others.
The role of reinforcement delay and response effort in choice is a key area of investigation.

Purpose of the Study:

To investigate pigeon choice behavior under concurrent-chains schedules with different terminal-link response requirements.
To examine the influence of terminal-link schedule parameters and response topography on choice proportions.
To evaluate the predictive accuracy of the delay-reduction hypothesis in this context.

Main Methods:

Six pigeons were trained on concurrent-chains schedules.

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Initial links involved variable-interval schedules; terminal links involved paired variable-interval schedules with either pecking or treadling as the response.

Five pairs of terminal-link schedules were systematically varied to assess choice under different reinforcement delays.

Main Results:

Pigeons consistently chose the alternative associated with terminal-link pecking, regardless of schedule parameters.
Terminal-link pecking resulted in shorter delays to reinforcement compared to treadling.
The delay-reduction hypothesis offered only moderate accuracy in predicting behavior when response topographies differed.

Conclusions:

Response topography, particularly pecking, is a significant factor in choice behavior under concurrent-chains schedules.
Shorter terminal-link delay to reinforcement for pecking contributes to the observed preference.
Quantitative models of choice behavior may need to incorporate response topography to be more complete.