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Concurrent schedule control of monkey's observing during vigilance.
1Department of Behavioral Science, Faculty of Letters, Hokkaido University, Kita-10, Nishi-7, Kita-ku, Sapporo 060, Japan.
Behavioural Processes
|June 5, 2014
Summary
This study on crab-eating macaques suggests vigilance tasks, requiring signal detection and response, differ from typical choice tasks. Macaques showed undermatching in vigilance tasks, indicating unique performance patterns.
Area of Science:
- Behavioral neuroscience
- Animal cognition
- Primate behavior
Background:
- Vigilance tasks assess sustained attention and response to infrequent signals.
- Understanding primate behavior in operant conditioning paradigms is crucial for cognitive research.
Purpose of the Study:
- To investigate how crab-eating macaques perform on vigilance tasks compared to standard choice tasks.
- To analyze time allocation and response patterns in different operant conditioning scenarios.
Main Methods:
- Three experiments using crab-eating macaques (Macaca fascicularis).
- Experiment I: Vigilance task with lever press/release for signal detection under concurrent variable-interval schedules.
- Experiments II & III: Compared vigilance task performance with a standard choice task involving lever holding and primary reinforcement.
Main Results:
- Subjects exhibited frequent switchovers between alternatives in vigilance tasks.
- Time allocation in vigilance tasks showed under-matching to reinforcement ratios.
- One subject showed less rapid alternation in a choice task compared to the vigilance task, and another subject's performance roughly matched reinforcement ratios in the choice task but showed undermatching in the vigilance task.
Conclusions:
- Primate performance in vigilance tasks may differ significantly from performance in typical lever-pressing choice tasks.
- Under-matching in vigilance tasks suggests distinct behavioral control mechanisms compared to choice tasks.
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