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rdf:type |
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lifeskim:mentions |
umls-concept:C0011155,
umls-concept:C0020903,
umls-concept:C0026336,
umls-concept:C0026339,
umls-concept:C0030705,
umls-concept:C0036341,
umls-concept:C0162429,
umls-concept:C0332120,
umls-concept:C0439780,
umls-concept:C0597198,
umls-concept:C1282910
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pubmed:issue |
1-3
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pubmed:dateCreated |
2010-7-26
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pubmed:abstractText |
When non-psychiatric individuals compare the weights of two similar objects of identical mass, but of different sizes, the smaller object is often perceived as substantially heavier. This size-weight illusion (SWI) is thought to be generated by a violation of the common expectation that the large object will be heavier, possibly via a mismatch between an efference copy of the movement and the actual sensory feedback received. As previous research suggests that patients with schizophrenia have deficits in forward model/efference copy mechanisms, we hypothesized that schizophrenic patients would show a reduced SWI. The current study compared the strength of the SWI in schizophrenic patients to matched non-psychiatric participants; weight discrimination for same-sized objects was also assessed. We found a reduced SWI for schizophrenic patients, which resulted in better (more veridical) weight discrimination performance on illusion trials compared to non-psychiatric individuals. This difference in the strength of the SWI persisted when groups were matched for weight discrimination performance. The current findings are consistent with a dysfunctional forward model mechanism in this population. Future studies to elucidate the locus of this impairment using variations on the current study are also proposed.
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pubmed:grant |
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-10667746,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-10862708,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-1094934,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-11691701,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-11729029,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-12027049,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-12414077,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-12581990,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-12662752,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-14647290,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-15296820,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-15329301,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-15560964,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-16137779,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-16330607,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-16641383,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-16943559,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-17136520,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-17851044,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-17928202,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-18395701,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-18801445,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-18986799,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-19026545,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-3628624,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-5146491,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-5431405,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-5971700,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-6729409,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-7054382,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-734369,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-8322034,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-8483695,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-8723199,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-915111,
http://linkedlifedata.com/resource/pubmed/commentcorrection/19931421-9709451
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:month |
Aug
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pubmed:issn |
1573-2509
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pubmed:author |
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pubmed:copyrightInfo |
Copyright 2009 Elsevier B.V. All rights reserved.
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pubmed:issnType |
Electronic
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pubmed:volume |
121
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
101-6
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pubmed:dateRevised |
2011-9-26
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pubmed:meshHeading |
pubmed-meshheading:19931421-Adult,
pubmed-meshheading:19931421-Feedback, Sensory,
pubmed-meshheading:19931421-Female,
pubmed-meshheading:19931421-Humans,
pubmed-meshheading:19931421-Illusions,
pubmed-meshheading:19931421-Male,
pubmed-meshheading:19931421-Middle Aged,
pubmed-meshheading:19931421-Models, Psychological,
pubmed-meshheading:19931421-Neuropsychological Tests,
pubmed-meshheading:19931421-Perceptual Disorders,
pubmed-meshheading:19931421-Psychophysics,
pubmed-meshheading:19931421-Schizophrenia,
pubmed-meshheading:19931421-Size Perception,
pubmed-meshheading:19931421-Weight Perception
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pubmed:year |
2010
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pubmed:articleTitle |
Superior size-weight illusion performance in patients with schizophrenia: evidence for deficits in forward models.
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pubmed:affiliation |
Department of Psychology, University of California San Diego, 9500 Gilman Drive #0109, La Jolla, CA 92093-0109, USA. lewilliams1@gmail.com
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, N.I.H., Extramural
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