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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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Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
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Related Experiment Video

Updated: Jan 19, 2026

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
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Training face perception in developmental prosopagnosia through perceptual learning.

Sherryse L Corrow1, Jodie Davies-Thompson2, Kimberley Fletcher3

  • 1Human Vision and Eye Movement Laboratory, Departments of Medicine (Neurology), Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, Canada; Visual Cognition Laboratory, Psychology Department, Bethel University, St. Paul, MN, USA; Department of Psychology, University of Warwick, Coventry, England, UK.

Neuropsychologia
|September 22, 2019
PubMed
Summary

Perceptual learning training significantly improved face discrimination in individuals with developmental prosopagnosia. These benefits persisted for months and generalized to new faces and expressions.

Keywords:
Article –DevelopmentFace recognitionRehabilitationVisionWord count: abstract

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Area of Science:

  • Cognitive Neuroscience
  • Perceptual Psychology

Background:

  • Acquired prosopagnosia shows improvement with perceptual learning.
  • Developmental prosopagnosia (DP) is a condition affecting face recognition from birth.

Purpose of the Study:

  • To investigate if perceptual learning can enhance face perception in individuals with developmental prosopagnosia.
  • To assess the generalization and maintenance of training-induced improvements.

Main Methods:

  • Ten individuals with DP underwent several months of training involving shape discrimination of morphed facial images.
  • A staircase procedure optimized training difficulty; ecological validity was enhanced by varying facial views and expressions.
  • Control and follow-up assessments were conducted to evaluate training efficacy and long-term benefits.

Main Results:

  • Perceptual sensitivity for faces improved significantly after training, unlike the control task.
  • Improvements generalized to various facial expressions and views, with some transfer to novel faces.
  • Benefits were maintained over three months, with some participants reporting improved daily-life face recognition.

Conclusions:

  • Perceptual learning offers a viable method for persistent improvement in face discrimination for individuals with developmental prosopagnosia.
  • The generalization of learning suggests the development of robust, 3D facial representations.
  • This approach holds promise for therapeutic interventions in face perception disorders.