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The composite face effect is robust against perceptual misfit.

David Kurbel1, Bozana Meinhardt-Injac2, Malte Persike3

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|April 23, 2021
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The composite face effect, crucial for understanding face perception, remains consistent regardless of how well face halves fit together. Perceptual fit quality does not influence this phenomenon.

Keywords:
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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • The composite face effect demonstrates how humans process faces holistically.
  • Selective attention failures in composite faces are key to studying feature integration.

Purpose of the Study:

  • To investigate if the perceptual fit between attended and unattended face halves affects the composite face effect.
  • To determine the role of Gestalt principles in holistic face processing.

Main Methods:

  • Used composite faces with varying degrees of perceptual fit (seamless, bad, random).
  • Measured the composite face effect using alignment × congruency interaction and alternative analysis methods.
  • Collected ratings from trained observers on face half perceptual fit.

Main Results:

  • Identical and strong composite face effects were observed across all perceptual fit conditions.
  • The quality of perceptual fit did not modulate the strength of the composite face effect.
  • Neither good nor bad perceptual fit attenuated the composite face effect.

Conclusions:

  • Perceptual fit quality is not a critical factor in the composite face effect.
  • Findings challenge Gestalt-based accounts that emphasize perceptual homogeneity for holistic face processing.
  • Holistic face processing mechanisms may operate independently of the perceived seamlessness of facial features.