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- Title
Individual variability in visual recognition memory of black-handed spider monkeys (Ateles geoffroyi).
- Authors
Reynoso-Cruz, J. Eduardo; Hernández-Salazar, Laura Teresa; Nieto, Javier
- Abstract
Recognition memory is an ability that allows animals to respond differentially to stimuli, individuals, or situations experienced in the past and plays an important role in foraging and social behavior. We tested the ability of black-handed spider monkeys (Ateles geoffroyi) to remember and recognize visual stimuli that belong to 6 categories. Seven adult spider monkeys (Ateles geoffroyi) solved a delayed match-to-sample task where they had to touch a list of picture samples with different lengths (3, 4, and 5 pictures). After that, they waited for different retention intervals (0, 15, and 30 s), and 2 pictures were presented. The spider monkeys touched 1 of 2 pictures, signaling which was presented in the list. The results indicate effects of the retention interval, the list length, and the list position on picture recognition. Individual plots also show different strategies of the individuals used to solve the task, such as remembering the first picture in the list (primacy), remembering the last picture in the list (recency), or remembering both positions in the list; these strategies change as the retention interval increases. The results did not show better recognition for any of the picture categories. Based on these results and previous research, we recommend changes to the task and the statistical analysis for a better understanding of the underlying mechanism of recognition memory.
- Subjects
MONKEYS; VISUAL perception; FORAGING behavior; VISUAL memory; TASK analysis; RECOGNITION (Psychology)
- Publication
International Journal of Comparative Psychology, 2021, Vol 34, p1
- ISSN
0889-3667
- Publication type
Article