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Updated: Aug 7, 2026
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Assaying Locomotor Activity to Study Circadian Rhythms and Sleep Parameters in Drosophila
Published on: September 28, 2010
The effects of total darkness on schedule control
Journal of the Experimental Analysis of Behavior
|September 1, 1974
Summary
Pigeon key pecking behavior changed significantly in total darkness. Responding under ratio schedules increased, while interval schedule responding decreased, demonstrating light
Area of Science:
- Animal Behavior
- Operant Conditioning
- Avian Cognition
Background:
- Pigeon key pecking is a well-studied operant behavior.
- Environmental factors like light can influence response rates.
Purpose of the Study:
- To investigate the impact of total darkness on pigeon key pecking.
- To compare these effects across different schedules of reinforcement.
Main Methods:
- Eight pigeons were exposed to four schedules: fixed-ratio, variable-ratio, fixed-interval, and variable-interval.
- An ABAB design alternated light and dark conditions over multiple sessions.
- Light intensity was manipulated, including periods of total darkness.
Main Results:
- Key pecking under ratio schedules increased by 20% to 108% in darkness.
- Key pecking under interval schedules decreased by 37% to 93% in darkness.
Conclusions:
- Total darkness differentially affects pigeon responding based on reinforcement schedules.
- Ratio schedules may be less sensitive to light deprivation than interval schedules in pigeons.
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