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Behavioral reactions reflecting differential reward expectations in monkeys
M Watanabe1, H C Cromwell, L Tremblay
1Department of Psychology, Tokyo Metropolitan Institute for Neuroscience, 2-6 Musashidai, Fuchu, Tokyo, 183-0042, Japan.
Experimental Brain Research
|October 31, 2001
Summary
Primates adjust their actions based on expected rewards. Monkeys showed faster movements and longer anticipatory licking for more preferred rewards, demonstrating differential outcome expectations.
Area of Science:
- Neuroscience
- Behavioral Science
- Cognitive Psychology
Background:
- Learning theory highlights the role of expectations in instrumental action.
- Understanding outcome expectations is crucial for explaining behavioral control.
Purpose of the Study:
- Investigate how primates' behavioral reactions vary with different predicted rewards.
- Explore differential outcome expectations in primates using behavioral tasks.
Main Methods:
- Utilized spatial delayed response and delayed reaction tasks in primates.
- Assessed reaction times for operantly conditioned arm movements.
- Measured anticipatory licking durations as a Pavlovian conditioned response.
Main Results:
- Reaction times were shorter for more preferred rewards compared to less preferred ones.
- Significant differences in reaction times and anticipatory licking were observed between rewarded and unrewarded trials.
- Anticipatory licking duration varied with the predicted reward's preference level.
Conclusions:
- Behavioral reactions are modulated by predicted future rewards in primates.
- Primates demonstrate differential expectations of specific outcomes in cognitive tasks.
- Findings support the role of expectation in the control of instrumental action.
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