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The Two-Body Inversion Effect.

Liuba Papeo1,2, Timo Stein3, Salvador Soto-Faraco1,4

  • 11 Center for Brain and Cognition, Universitat Pompeu Fabra.

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|February 1, 2017
PubMed
Summary
This summary is machine-generated.

Human body perception is influenced by relative positioning. Facing human bodies are recognized better than non-facing ones, suggesting they are processed as a single unit.

Keywords:
configural processingface perceptionobject recognitionscene perceptionsocial perception

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Area of Science:

  • Cognitive Psychology
  • Visual Perception
  • Social Cognition

Background:

  • Functionally interacting objects are perceptually grouped.
  • Previous research indicates that the visual system processes individual human bodies.
  • The perception of multiple human bodies and their interactions remains less understood.

Purpose of the Study:

  • To investigate how the relative positioning of multiple human bodies affects their perceptual processing.
  • To determine if facing body dyads are processed differently from non-facing body dyads.
  • To explore the role of configural processing in the perception of interacting human bodies.

Main Methods:

  • Series of categorization experiments involving human body stimuli.
  • Manipulation of body orientation (facing each other vs. facing away).
  • Inclusion of stimulus inversion to test for configural processing.

Main Results:

  • Human bodies facing each other (interacting dyads) were recognized more accurately than those facing away (noninteracting dyads).
  • Recognition of facing body dyads was significantly impaired by inversion, unlike non-facing dyads.
  • The inversion effect suggests sensitivity to the upright configuration of facing body dyads.

Conclusions:

  • The visual system is sensitive to the configuration of facing human body dyads.
  • Facing body dyads appear to be represented as a single, structured unit.
  • This unified representation may serve as an intermediate step between perceiving individual bodies and understanding social actions.