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Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography
09:25

Detecting Pre-Stimulus Source-Level Effects on Object Perception with Magnetoencephalography

Published on: July 26, 2019

Expertise increases the functional overlap between face and object perception.

Thomas J McKeeff1, Rankin W McGugin, Frank Tong

  • 1Department of Psychology, Princeton University, Princeton, NJ, USA.

Cognition
|October 12, 2010
PubMed
Summary
This summary is machine-generated.

Object expertise can interfere with face recognition. Experts showed slower face identification when cars were present, suggesting expertise alters how the brain processes familiar objects and faces.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Perception

Background:

  • Expertise with specific objects, like cars, can impact the processing of other visual stimuli, including faces.
  • It is debated whether this interference stems from an expertise-specific bottleneck or attentional capture by expert objects.

Purpose of the Study:

  • To investigate the perceptual costs associated with object expertise on face processing.
  • To determine if expertise creates a bottleneck or influences resource allocation in visual attention.

Main Methods:

  • Used Rapid Serial Visual Presentation (RSVP) to measure visual identification thresholds.
  • Compared car experts and novices searching for face and watch targets among car distractors at varying speeds.

Main Results:

  • Car experts were slower than novices at identifying faces among irrelevant cars.
  • Car experts were faster than novices at identifying watches among cars.
  • Expertise increased functional overlap between cars and faces, but decreased it between cars and watches.

Conclusions:

  • Object expertise does not create an encapsulated module for face processing.
  • Expertise modulates the functional relationship between object categories, affecting face and non-face stimuli.
  • Interference in face processing due to object expertise is linked to altered functional overlap rather than a fixed bottleneck.