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Prosopagnosia01:24

Prosopagnosia

Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Conscious and Non-conscious Representations of Emotional Faces in Asperger's Syndrome
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Implicit familiarity processing in congenital prosopagnosia.

Galia Avidan1, Marlene Behrmann

  • 1Department of Psychology, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel galiaa@bgu.ac.il

Journal of Neuropsychology
|April 1, 2009
PubMed
Summary

Individuals with congenital prosopagnosia (CP) show impaired overt face recognition but retain covert face recognition abilities. This suggests implicit familiarity processing persists despite explicit recognition deficits in CP.

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Area of Science:

  • Cognitive Neuroscience
  • Psychology

Background:

  • Acquired prosopagnosia (AP) patients often show intact covert face recognition despite impaired overt recognition.
  • This dissociation suggests distinct mechanisms for explicit and implicit face processing.

Purpose of the Study:

  • To investigate if individuals with congenital prosopagnosia (CP) exhibit a similar dissociation between overt and covert face recognition.
  • To explore the presence of implicit face processing in CP.

Main Methods:

  • Six individuals with CP and control participants completed a face identity matching task.
  • Familiarity of faces (famous vs. unknown) was manipulated orthogonally to the matching task.

Main Results:

  • CP individuals were slower and less accurate than controls in face recognition.
  • Both CP and control groups showed faster and more accurate matching for famous compared to unknown faces.
  • Performance on unrecognized famous faces was intermediate, indicating covert familiarity processing.

Conclusions:

  • This study provides the first evidence of implicit familiarity processing in congenital prosopagnosia.
  • Individuals with CP demonstrate covert face recognition despite significant deficits in explicit recognition.
  • The findings support models of dissociation between overt and covert face processing in CP.