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Visual list memory in capuchin monkeys (Cebus apella).

A A Wright1

  • 1Department of Neurobiology and Anatomy, University of Texas Medical School, Houston 77225, USA. aawright@nbal9.med.uth.tmc.edu

Journal of Comparative Psychology (Washington, D.C. : 1983)
|March 31, 1999
PubMed
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Capuchin monkeys show both recency and primacy effects in memory tasks. Their visual memory capacity is comparable to rhesus monkeys, not superior.

Area of Science:

  • Cognitive Neuroscience
  • Primate Behavior
  • Comparative Psychology

Background:

  • Capuchin monkeys (Cebus apella) exhibit advanced tool-use skills, prompting investigation into their general cognitive abilities.
  • Memory, a key cognitive function, is crucial for understanding complex behaviors like tool use.

Purpose of the Study:

  • To investigate the visual memory capabilities of capuchin monkeys.
  • To examine how retention intervals affect memory recall, specifically recency and primacy effects.
  • To compare capuchin monkey memory with other species, including rhesus monkeys, humans, and pigeons.

Main Methods:

  • Three capuchin monkeys were tested on their ability to recognize travel-slide pictures from presented lists.
  • Memory was assessed using different retention intervals (0s to 30s).

Related Experiment Videos

  • Participants indicated recognition by touching areas on a video monitor.

    • Main Results:

    • At short retention intervals (0-2s), monkeys demonstrated a recency effect, recalling recent items better.
    • At a 10s interval, a primacy effect emerged, with better recall of early list items.
    • Longer intervals (20-30s) showed strong primacy effects and diminished recency effects, mirroring patterns in other species.

    Conclusions:

    • Capuchin monkeys exhibit distinct primacy and recency effects in visual memory, influenced by retention intervals.
    • The observed memory pattern is similar across capuchins, rhesus monkeys, humans, and pigeons.
    • Despite advanced tool-use, capuchin monkeys' visual memory is not superior to that of rhesus monkeys.