October 2003
Volume 3, Issue 9
Vision Sciences Society Annual Meeting Abstract  |   October 2003
Normal object discrimination in a developmental prosopagnosic
Author Affiliations
  • Bradley C Duchaine
    Department of Psychology, Harvard University, USA
  • Edward J Butterworth
    Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, NY, NY, USA
  • Ken Nakayama
    Department of Psychology, Harvard University, USA
Journal of Vision October 2003, Vol.3, 103. doi:https://doi.org/10.1167/3.9.103
  • Views
  • Share
  • Tools
    • Alerts
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Bradley C Duchaine, Edward J Butterworth, Ken Nakayama; Normal object discrimination in a developmental prosopagnosic. Journal of Vision 2003;3(9):103. https://doi.org/10.1167/3.9.103.

      Download citation file:

      © ARVO (1962-2015); The Authors (2016-present)

  • Supplements

The subordinate level hypothesis states that prosopagnosics have impairments to mechanisms required for recognition of specific exemplars, and so it predicts that individuals with face recognition impairments should also be impaired with non-face recognition. Edward, a 51-year-old developmental prosopagnosic, is severely impaired with recognition of identity, emotions, and gender from the face. He was able to name only 3 of 25 famous faces despite reporting significant exposure to 19 of these celebrities and performed far out of the normal range on a test of unfamiliar face recognition. In order to test the subordinate level hypothesis, we tested his face and non-face discrimination using the same method. On two versions of the task that used faces, Edward's accuracy was severely impaired, and his response times were also far longer than the controls. His accuracy was normal with horses, cars, houses, and tools, borderline with guns, and impaired with landscapes. These results demonstrate that face discrimination can be impaired while discrimination with non-face categories is normal, and so indicate that the subordinate level hypothesis cannot account for some cases of prosopagnosia. Finally, because Edward's difficulties with faces appear to be the result of developmental problems, the results suggest that different developmental processes are responsible for building the separate mechanisms involved with face and non-face recognition.

Duchaine, B. C., Butterworth, E. J., Nakayama, K.(2003). Normal object discrimination in a developmental prosopagnosic [Abstract]. Journal of Vision, 3( 9): 103, 103a, http://journalofvision.org/3/9/103/, doi:10.1167/3.9.103. [CrossRef]

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.