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Related Experiment Videos

Handedness and approach-avoidance behavior in chimpanzees (Pan)

W D Hopkins1, A J Bennett

  • 1Division of Behavioral Biology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322.

Journal of Experimental Psychology. Animal Behavior Processes
|October 1, 1994
PubMed
Summary

Right-handed chimpanzees showed quicker approach-avoidance behavior toward novel objects than non-right-handed individuals. Male chimpanzees also displayed faster object interaction, supporting theories on hemispheric specialization and affective behaviors.

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Area of Science:

  • Primate Behavior
  • Neuroscience
  • Comparative Psychology

Background:

  • Hand preference, a manifestation of brain lateralization, is linked to behavioral differences.
  • Approach-avoidance behavior reflects an organism's response to novel stimuli.
  • Understanding these links in non-human primates offers insights into evolutionary mechanisms.

Purpose of the Study:

  • To investigate the relationship between hand preference and approach-avoidance behavior in chimpanzees.
  • To determine if handedness influences the speed of interaction with novel objects.
  • To explore sex differences in approach-avoidance behavior.

Main Methods:

  • Forty-nine chimpanzees (Pan) were assessed for hand preference.
  • Novel objects were presented over four consecutive days in 2-hour sessions.

Related Experiment Videos

  • Latency to initiate contact with objects was recorded as a measure of approach-avoidance behavior.

    • Main Results:

    • Right-handed chimpanzees exhibited significantly shorter latencies to touch objects compared to non-right-handed individuals.
    • Male chimpanzees demonstrated faster object approach than female chimpanzees.
    • Approach-avoidance behavior showed significant consistency across different object sets and testing days.

    Conclusions:

    • Hand preference is associated with variations in approach-avoidance behavior in chimpanzees.
    • Sex differences in behavioral responses to novelty were observed.
    • Findings support models connecting hemispheric specialization with affective behavior expression.