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Perceptual and memorial contributions to developmental prosopagnosia
Philip I N Ulrich1, David T Wilkinson1, Heather J Ferguson1
1a School of Psychology, Keynes College , University of Kent , Canterbury , Kent , UK.
Quarterly Journal of Experimental Psychology (2006)
|April 16, 2016
Summary
Some individuals with developmental prosopagnosia (DP) may have memory impairments, not just perceptual deficits. This suggests a need to consider memory issues in diagnosing face blindness.
Area of Science:
- Cognitive Neuroscience
- Neuropsychology
Background:
- Developmental prosopagnosia (DP) is often linked to impaired perception of facial features.
- The exact cause of DP, whether perceptual or memory-related, remains debated.
Purpose of the Study:
- To investigate the role of memory versus perception deficits in developmental prosopagnosia.
- To differentiate between perceptual and memory impairments in individuals with self-reported face recognition difficulties.
Main Methods:
- Administered a battery of face perception tasks to 11 individuals with DP.
- Compared performance of DP participants to age- and gender-matched controls.
- Utilized formal tests of face recognition to assess performance.
Main Results:
- Group analysis revealed mild difficulties in holistic face processing and viewpoint matching in DP individuals.
- Six out of 11 participants showed no evidence of perceptual impairment.
- No specific perceptual deficit consistently explained poor face recognition in the remaining five individuals.
Conclusions:
- Some cases of developmental prosopagnosia may stem from memory impairments rather than primary perceptual deficits.
- Findings suggest the apperceptive/associative distinction, typically used for acquired prosopagnosia, may also apply to DP.
- Highlights the heterogeneity of underlying mechanisms in developmental prosopagnosia.
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