Visual perception without awareness in a patient with progressive posterior cortical atrophy: impaired explicity but not implicit processing or global information

Update item information
Publication Type Journal Article
School or College College of Social & Behavioral Science
Department Psychology
Creator Friedrich, Frances
Other Author Filoteo, J. Vincent.; Rabbel, Catherine; Stricker, John L.
Title Visual perception without awareness in a patient with progressive posterior cortical atrophy: impaired explicity but not implicit processing or global information
Date 2002
Description A patient with progressive posterior cortical atrophy (PCA) was examined on several tests of visual cognition. The patient displayed multiple visual cognitive deficits, which included problems identifying degraded stimuli, attending to two or more stimuli simultaneously, recognizing faces, tracing simple visual stimuli, matching simple shapes, and copying objects. The patient was also impaired in identifying visual targets contained at the global level within global"local stimuli (i.e., smaller letters that compose a larger letter). Although the patient denied any conscious awareness of the global form, he nevertheless displayed a normal pattern of global interference when asked to identify local level targets. Thus, the patient processed the global information despite not being consciously aware of such information. These results suggest that global"local processing can take place in the absence of awareness. Possible neurocognitive mechanisms explaining this dissociation are discussed.
Type Text
Publisher Cambridge University Press
First Page 461
Last Page 472
DOI 10.1017.S1355617701020252
Subject Posterior cortical atrophy; Global-local processing; Consciousness; Balint's syndrome; Simultanagnosia
Subject LCSH Vision disorders; Consciousness; Dementia
Language eng
Bibliographic Citation Friedrich, F. J., Filoteo, J. V., Rabbel, C. & Stricker, J. L. (2002). Visual perception without awareness in a patient with progressive posterior cortical atrophy: impaired explicity but not implicit processing or global information. Journal of the International Neuropsychology Society, 8, 461-72.
Rights Management (c) Cambridge University Press http://dx.doi.org DOI: 10.1017.S1355617701020252
Format Medium application/pdf
Format Extent 7,132,415 Bytes
Identifier ir-main,2722
ARK ark:/87278/s6h428z5
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 706249
Reference URL https://collections.lib.utah.edu/ark:/87278/s6h428z5
Back to Search Results