Visual object processing in schizophrenia : evidence for an associative agnosic deficit
Gabrovska, V.S.; Laws, K.R.; Sinclair, J.; McKenna, P. J.
Citation: Gabrovska , V S , Laws , K R , Sinclair , J & McKenna , P J 2002 , ' Visual object processing in schizophrenia : evidence for an associative agnosic deficit ' Schizophrenia Research , vol 59 , no. 2-3 , pp. 277-286 .
Early studies suggested visual form perception impairment in schizophrenia. To re-examine this claim and characterise the deficit neuropsychologically, 41 schizophrenic patients were administered tests sensitive to different levels of visual object perception and recognition. Intellectually well-preserved patients were examined separately on these and additional tests. Single case analysis was also applied to four patients showing varying degrees of general intellectual impairment. As a group, the patients showed little impairment on tests of early visual object perception, but greater impairment on higher-level visual processing tests, in particular object recognition and naming. This held true for patients with preserved general intellectual function. Single case analysis suggested that patients with schizophrenia have a selective deficit affecting object recognition and identification, with a pattern similar to visual associative agnosia in neurological patients.
Original article can be found at: http://www.sciencedirect.com Copyright Elsevier [Full text of this article is not available in the UHRA]