Faces as objects of non-expertise: Processing of Thatcherised faces in congenital prosopagnosia. Carbon, C., C., Grüter, T., Weber, J., E., & Lueschow, A. Perception, 36(11):1635-1645, 2007. abstract bibtex 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 Perception 26 225 ^ 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 orienta-
tion, 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.
@article{
title = {Faces as objects of non-expertise: Processing of Thatcherised faces in congenital prosopagnosia},
type = {article},
year = {2007},
pages = {1635-1645},
volume = {36},
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abstract = {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 Perception 26 225 ^ 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 orienta-
tion, 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.},
bibtype = {article},
author = {Carbon, C C and Grüter, T and Weber, J E and Lueschow, A},
journal = {Perception},
number = {11}
}
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