Evidence of an eye-movement based memory effect in congenital prosopagnosia

Bate, Sarah, Haslam, Catherine, Tree, Jeremy J. and Hodgson, Timothy L. (2008) Evidence of an eye-movement based memory effect in congenital prosopagnosia. Cortex, 44 7: 806-819. doi:10.1016/j.cortex.2007.02.004


Author Bate, Sarah
Haslam, Catherine
Tree, Jeremy J.
Hodgson, Timothy L.
Title Evidence of an eye-movement based memory effect in congenital prosopagnosia
Journal name Cortex   Check publisher's open access policy
ISSN 0010-9452
1973-8102
Publication date 2008-07-01
Year available 2007
Sub-type Article (original research)
DOI 10.1016/j.cortex.2007.02.004
Volume 44
Issue 7
Start page 806
End page 819
Total pages 13
Place of publication Milan, Italy
Publisher Elsevier Masson
Language eng
Abstract While extensive work has examined the role of covert recognition in acquired prosopagnosia, little attention has been directed to this process in the congenital form of the disorder. Indeed, evidence of covert recognition has only been demonstrated in one congenital case in which autonomic measures provided evidence of recognition (Jones and Tranel, 2001), whereas two investigations using behavioural indicators failed to demonstrate the effect (de Haan and Campbell, 1991; Bentin et al., 1999). In this paper, we use a behavioural indicator, an "eye movement-based memory effect" (Althoff and Cohen, 1999), to provide evidence of covert recognition in congenital prosopagnosia. In an initial experiment, we examined viewing strategies elicited to famous and novel faces in control participants, and found fewer fixations and reduced regional sampling for famous compared to novel faces. In a second experiment, we examined the same processes in a patient with congenital prosopagnosia (AA), and found some evidence of an eye movement-based memory effect regardless of his recognition accuracy. Finally, we examined whether a difference in scanning strategy was evident for those famous faces AA failed to explicitly recognise, and again found evidence of reduced sampling for famous faces. We use these findings to (a) provide evidence of intact structural representations in a case of congenital prosopagnosia, and (b) to suggest that covert recognition can be demonstrated using behavioural indicators in this disorder.
Keyword Congenital prosopagnosia
Covert recognition
Face
Implicit
Visual scanpath
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Psychology Publications
 
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Created: Fri, 15 Nov 2013, 20:18:44 EST by Catherine Haslam on behalf of School of Psychology