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Delay-interval illumination changes interfere with pigeon short-term memory

D K Tranberg, M Rilling

Journal of the Experimental Analysis of Behavior

|January 1, 1980

Summary

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Changes in light during delayed matching tasks disrupt pigeon memory, not the light itself. This suggests illumination changes retroactively interfere with short-term memory in pigeons.

Area of Science:

Cognitive psychology
Animal behavior

Background:

Delayed matching-to-sample tasks assess short-term memory.
Environmental stimuli can influence memory performance.

Purpose of the Study:

To investigate the effect of delay-interval illumination changes on pigeon short-term memory.
To determine if illumination itself or changes in illumination disrupt memory.

Main Methods:

Pigeons were trained on a successive delayed matching-to-sample task.
Delay-interval illumination conditions were altered during test sessions compared to baseline.
Matching performance was compared between baseline and altered illumination conditions.

Main Results:

Altering delay-interval illumination significantly disrupted matching performance.

Related Experiment Videos

Disruption occurred regardless of whether illumination increased or decreased.

The presence or absence of illumination change during the test session did not alter the disruption.

Conclusions:

Illumination per se during delay intervals does not impair pigeon short-term memory.
Changes in delay-interval illumination retroactively interfere with short-term memory in pigeons.