Gaze behaviour in hereditary prosopagnosia |
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Authors: | Gudrun Schwarzer Susanne Huber Martina Grüter Thomas Grüter Cornelia Groß Melanie Hipfel Ingo Kennerknecht |
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Institution: | University of Giessen, Otto-Behaghel-Strasse 10F, 35394 Giessen, Germany. gudrun.schwarzer@psychol.uni-giessen.de |
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Abstract: | Prosopagnosia is the inability to recognize someone by the face alone in the absence of sensory or intellectual impairment.
In contrast to the acquired form of prosopagnosia we studied the congenital form. Since we could recently show that this form
is inherited as a simple monogenic trait we called it hereditary form. To determine whether not only face recognition and
neuronal processing but also the perceptual acquisition of facial information is specific to prosopagnosia, we studied the
gaze behaviour of four hereditary prosopagnosics in comparison to matched control subjects. This rarely studied form of prosopagnosia
ensures that deficits are limited to face recognition. Whereas the control participants focused their gaze on the central
facial features, the hereditary prosopagnosics showed a significantly different gaze behaviour. They had a more dispersed
gaze and also fixated external facial features. Thus, the face recognition impairment of the hereditary prosopagnosics is
reflected in their gaze behaviour. |
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