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Medientyp:
E-Artikel
Titel:
Faces as Objects of Non-Expertise: Processing of Thatcherised Faces in Congenital Prosopagnosia
Beteiligte:
Carbon, Claus-Christian;
Grüter, Thomas;
Weber, Joachim E;
Lueschow, Andreas
Erschienen:
SAGE Publications, 2007
Erschienen in:Perception
Sprache:
Englisch
DOI:
10.1068/p5467
ISSN:
0301-0066;
1468-4233
Entstehung:
Anmerkungen:
Beschreibung:
<jats:p> Congenital prosopagnosia (cPA) is a severe disorder in recognising familiar faces, a human characteristic that is presumably innate, without any macro-spatial brain anomalies. Following the idea that cPA is based on deficits of configural face processing, we used a speeded grotesqueness decision task with thatcherised faces, since the Thatcher illusion can serve as a test of configural disruption (Lewis and Johnston, 1997 Perception26 225–227). The time needed to report the grotesqueness of a face in relation to orientation showed dissociate patterns between a group of fourteen people with cPA and a group of matched controls: whereas the RTs of controls followed a strong sigmoid function depending on rotation from the upright orientation, the RTs of people with cPA showed a much weaker sigmoid trend approaching a linear function. The latter result is interpreted as a diagnostic sign of impaired configural processing, being the primary cause of the absence of ‘face expertise’ in prosopagnosia. </jats:p>