Spatial and object working memory impairments in schizophrenia patients: a Bayesian item-response theory analysis.
This study reports evidence that schizophrenia patients are significantly impaired in both spatial and object (shape) working memory. A 3-s delay between exposure and recall of targets was used and Bayesian item-response theory was applied to compensate for the tasks' differential difficulty while simultaneously taking account of missing data from participant attrition. Weaker evidence was found that in schizophrenia both domains are equally impaired on average, that spatial and object working memory appear to be more highly correlated with each other in the schizophrenia population than in the normal population, and that schizophrenia patients show greater variability in spatial than object working memory performance.
Coleman
Michael J
MJ
Psychology Research Laboratory, Mailman Research Center, McLean Hospital, Belmont, Massachusetts 02478, USA.
Cook
Samantha
S
Matthysse
Steven
S
Barnard
John
J
Lo
Yungtai
Y
Levy
Deborah L
DL
Rubin
Donald B
DB
Holzman
Philip S
PS
D000328:Adult; D001499:Bayes Theorem; D005260:Female; D006801:Humans; D008297:Male; D008568:Memory / Q000502:physiology; D008569:Memory Disorders / Q000523:psychology*; D011939:Mental Recall / Q000502:physiology; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual / Q000502:physiology; D012559:Schizophrenia / Q000503:physiopathology*; D012565:Schizophrenic Psychology; D012923:Social Class; D014796:Visual Perception / Q000502:physiology