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Related Experiment Videos

Bodies and their parts.

Julie Bauer Morrison1, Barbara Tversky

  • 1Bryant University, Smithfield, Rhode Island, USA. julie.morrison@gcmail.maricopa.edu

Memory & Cognition
|October 27, 2005
PubMed
Summary

Mental body part representation depends on context. Perceptual body part comparisons rely on distinctiveness, while naming activates functional significance, challenging simple size-based models.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Factors

Background:

  • Understanding mental representations of the human body is crucial for cognitive science.
  • Previous models proposed size, distinctiveness, or significance as key factors in body part verification.
  • The correlation between distinctiveness and significance made it difficult to differentiate their roles.

Purpose of the Study:

  • To investigate how humans mentally represent body parts.
  • To differentiate between the part distinctiveness and part significance accounts of body representation.
  • To examine the influence of perceptual versus naming-based comparisons on body part verification.

Main Methods:

  • Four experiments were conducted using both name-body and body-body comparison tasks.
  • Participants verified the presence or properties of body parts.
  • Response times were analyzed to infer underlying cognitive processes.

Main Results:

  • Larger body parts were verified more slowly than smaller ones, refuting the imagery/size account.
  • In perceptual (body-body) comparisons, part distinctiveness best predicted verification times.
  • In naming (name-body) comparisons, part significance emerged as the strongest predictor, suggesting activation of functional aspects.

Conclusions:

  • Mental body part representation is not solely based on size.
  • Part distinctiveness is critical for perceptual body part judgments.
  • Part significance, linked to functional aspects, dominates when naming is involved.

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