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Related Experiment Video

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Object permanence in common marmosets (Callithrix jacchus).

Natacha Mendes1, Ludwig Huber

  • 1Institute of Zoology, University of Vienna, Vienna, Austria.

Journal of Comparative Psychology (Washington, D.C. : 1983)
|March 11, 2004
PubMed
Summary
This summary is machine-generated.

Common marmosets (Callithrix jacchus) demonstrated object permanence, successfully locating hidden items in most tasks. Their performance suggests an ability to mentally track unseen objects, indicating advanced cognitive skills in this primate species.

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Area of Science:

  • Primate cognition
  • Comparative psychology
  • Developmental psychology

Background:

  • Object permanence, the understanding that objects continue to exist when not perceived, is a key cognitive milestone.
  • Research has explored object permanence in various species, but primate studies offer unique insights into evolutionary cognitive processes.

Purpose of the Study:

  • To investigate object permanence abilities in common marmosets (Callithrix jacchus).
  • To assess marmoset performance across a range of object permanence tasks mirroring human developmental stages.

Main Methods:

  • Administered 9 search tasks based on Piagetian Stages 3-6 of object permanence.
  • Tested 11 common marmosets, with up to 24 trials per task.
  • Recorded success rates and analyzed error patterns.

Main Results:

  • Marmoset success rates varied significantly across tasks and individuals.
  • Most subjects performed above chance on visible and invisible displacement tasks.
  • No performance improvement was observed across trials, with errors attributed to location preferences, simple strategies, or attentional deficits.

Conclusions:

  • At least two marmosets achieved high scores, suggesting robust object permanence capabilities.
  • These findings indicate that common marmosets can represent the existence and movement of unperceived objects.
  • The study highlights the advanced cognitive abilities of Callithrix jacchus in understanding object permanence.