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Serial visual reversal learning in captive black-handed spider monkeys, Ateles geoffroyi
Jules Dorschner1, Laura Teresa Hernandez Salazar2, Matthias Laska3
1IFM Biology, Linköping University, Linköping, SE-581 83, Sweden.
Animal Cognition
|August 13, 2024
Summary
Black-handed spider monkeys demonstrate advanced cognitive flexibility. These primates excel at serial visual reversal learning, outperforming many other species and supporting the link between socio-ecological factors and enhanced cognitive skills.
Area of Science:
- Primate cognition
- Behavioral neuroscience
- Comparative psychology
Background:
- Socio-ecological factors like diet and social structure are hypothesized to drive primate cognitive evolution.
- Spider monkeys (Ateles geoffroyi) possess complex social dynamics and specialized diets, making them ideal subjects for cognitive research.
Purpose of the Study:
- To assess the serial visual reversal learning abilities of black-handed spider monkeys.
- To investigate the relationship between socio-ecological factors and advanced cognitive skills in primates.
Main Methods:
- A two-alternative choice visual discrimination task was employed.
- Spider monkeys were trained to a criterion, followed by repeated stimulus reversal learning trials.
- Performance was measured by learning speed and the number of reversals completed within 80 sessions.
Main Results:
- Spider monkeys rapidly learned visual discriminations and reversal tasks.
- Learning speed increased across successive reversals, indicating serial reversal learning-set formation.
- Their performance surpassed that of chimpanzees and other mammals in initial learning and first reversal tasks.
Conclusions:
- Spider monkeys exhibit significant behavioral flexibility and inhibitory control.
- These findings support the hypothesis that dietary specialization and social complexity enhance primate cognitive abilities.
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