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Knowing about knowing: dissociations between perception and action systems over evolution and during development.

Marc D Hauser1

  • 1Department of Psychology and Program in Neurosciences, Harvard University, Cambridge, Massachusetts 02138, USA. mdhauser@wjh.harvard.edu

Annals of the New York Academy of Sciences
|November 20, 2003
PubMed
Summary
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Human patients and infants show a perception-action gap. This study suggests nonhuman primates also exhibit this disconnect, particularly in folk physics, indicating they may not always know what they know.

Area of Science:

  • Cognitive Science
  • Developmental Psychology
  • Neuroscience

Background:

  • Human studies reveal perception-action dissociations, where implicit knowledge is inaccessible for action.
  • Infant development shows similar gaps, suggesting underdeveloped neural connections between action and perception.

Purpose of the Study:

  • To explore the evolution of knowledge and the perception-action link.
  • To investigate if similar dissociations exist in adult nonhuman primates, particularly in folk physics.

Main Methods:

  • Comparative analysis of human patient data, infant development studies, and nonhuman primate behavior.
  • Focus on the domain of folk physics to assess knowledge representation and action execution.

Main Results:

Related Experiment Videos

  • Perception-action dissociations observed in human patients and infants are also present in normal adult nonhuman primates.
  • These dissociations are particularly evident in the domain of folk physics.

Conclusions:

  • For certain knowledge domains, animals may not be aware of their own knowledge.
  • The disconnect between perception and action can lead to perseverative errors, indicative of modular cognitive systems.