The 20 item prosopagnosia index (PI20): relationship with the Glasgow face-matching test

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  • Punit Shah
    MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
  • Sophie Sowden
    MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK
  • Anne Gaule
    Institute of Neurology, University College London, London, UK
  • Caroline Catmur
    Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, University of London, London, UK
  • Geoffrey Bird
    MRC Social, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, London, UK

Description

<jats:p>The 20 item prosopagnosia index (PI20) was recently developed to identify individuals with developmental prosopagnosia. While the PI20’s principal purpose is to aid researchers and clinicians, it was suggested that it may serve as a useful screening tool to identify people with face recognition difficulties in applied settings where face matching is a critical part of their occupation. Although the PI20 has been validated using behavioural measures of face<jats:italic>recognition</jats:italic>, it has yet to be validated against a measure of face-<jats:italic>matching</jats:italic>ability that is more representative of applied settings. In this study, the PI20 was therefore administered with the Glasgow face-matching test (GFMT). A strong correlation was observed between PI20 and GFMT scores, providing further validation for the PI20, indicating that it is likely to be of value in applied settings.</jats:p>

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