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N170 adaptation effect for repeated faces and words.

X Cao1, X Ma2, C Qi2

  • 1Department of Psychology, Zhejiang Normal University, Jinhua 321001, China; Department of Psychology, Vanderbilt University, Nashville, TN 37240, USA.

Neuroscience
|March 17, 2015
PubMed
Summary

The N170 adaptation effect, a brain response to faces and words, differs for repeated items. Faces show reduced N170 with repeated adaptors, while words show increased N170, suggesting distinct early perceptual processing.

Keywords:
N170adaptation effectfacesrepeated itemswords

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • The N170 adaptation effect is a well-established phenomenon in visual perception, particularly for faces and words.
  • Previous research indicates N170 adaptation is stable, but its behavior with repeated identities remained unclear.

Purpose of the Study:

  • To investigate the N170 adaptation effect for repeated identities in faces.
  • To determine if the N170 adaptation effect for repeated items generalizes to words.

Main Methods:

  • Two experiments using event-related potential (ERP) adaptation paradigms.
  • Experiment 1: Examined face-related N170 adaptation with a short interstimulus interval (ISI).
  • Experiment 2: Assessed N170 adaptation for words using a similar paradigm.

Main Results:

  • Experiment 1 showed a smaller N170 response to faces preceded by the same face adaptor compared to a different face adaptor.
  • Experiment 2 revealed a larger N170 response to words preceded by a different word adaptor than by the same word adaptor.
  • These findings indicate differential N170 adaptation for faces and words.

Conclusions:

  • The face-related N170 response is sensitive to visual face features.
  • N170 adaptation characteristics extend to words, demonstrating sensitivity to repeated items.
  • Early perceptual processing of faces and words shares commonalities, despite observed differences in adaptation effects.