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Control by sample location in pigeons' matching to sample

K M Lionello¹, P J Urcuioli

¹Department of Psychological Sciences, Purdue University, West Lafayette, Indiana 47907, USA. lionello@psych.purdue.edu

Journal of the Experimental Analysis of Behavior

|November 20, 1998

Summary

This summary is machine-generated.

Pigeons trained on matching to sample tasks showed disrupted performance when sample location varied. This suggests sample location strongly influences learning and choice behavior in pigeons.

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Area of Science:

* Cognitive psychology
* Animal behavior
* Comparative cognition

Background:

* Matching to sample is a fundamental task in cognitive research.
* The role of stimulus location in learning and choice behavior is not fully understood.
* Previous research has primarily used center-key sample presentation.

Purpose of the Study:

* To investigate the impact of sample location on pigeons' matching to sample performance.
* To determine if pigeons can learn to ignore sample location.
* To assess the implications of location control for symmetry testing.

Main Methods:

* Three experiments involving pigeons performing identity matching to sample tasks.
* Varying sample location across center and side keys.
* Training with zero-delay and simultaneous conditions; testing with varied stimuli and locations.

Main Results:

* Varying sample location disrupted matching accuracy, particularly when samples appeared on side keys.
* Pigeons trained to match samples in various locations still showed location control.
* Accuracy decreased significantly on trials with side-key samples and side-key choices on different keys.

Conclusions:

* Sample location exerts significant control over pigeons' matching to sample behavior.
* The persistent control by location complicates the interpretation of learning and memory.
* The findings preclude symmetry testing in paradigms where sample location varies.