Dimensions of intelligence in schizophrenia: evidence from patients with preserved, deteriorated and compromised intellect

There is a growing literature describing a subgroup of “high-functioning” people with schizophrenia who show preserved intellectual ability (IQ). A detailed characterisation of the cognitive abilities of this group may be important in targeting appropriate treatment, management and services for pati...

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Bibliographic Details
Published in:Journal of psychiatric research 2005, Vol.39 (1), p.11-19
Main Authors: Badcock, Johanna C., Dragović, Milan, Waters, Flavie A.V., Jablensky, Assen
Format: Article
Language:English
Subjects:
Adolescent
Adult
Adult and adolescent clinical studies
Aged
Attention
Biological and medical sciences
Case-Control Studies
Cognition
Cognition Disorders - etiology
Cognition Disorders - psychology
Core deficits
Female
Heterogeneity
Humans
Intelligence
Intelligence Tests
Male
Medical sciences
Memory
Middle Aged
Psychology. Psychoanalysis. Psychiatry
Psychopathology. Psychiatry
Psychoses
Schizophrenia
Schizophrenic Psychology
Task Performance and Analysis
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Summary:There is a growing literature describing a subgroup of “high-functioning” people with schizophrenia who show preserved intellectual ability (IQ). A detailed characterisation of the cognitive abilities of this group may be important in targeting appropriate treatment, management and services for patients with schizophrenia. It is a widely held belief that variation in cognitive processing speed is the basis of individual differences in intelligence. The main objective of this study was to identify subgroups of schizophrenia patients with preserved ( N=45), deteriorated ( N=47) and compromised ( N=17) intellect in order to study whether these subgroups differ in specific cognitive abilities (e.g. executive functions) or in general cognitive processing speed, as measured with an inspection time (IT) task. The patients who displayed an average estimated premorbid IQ, with no evidence of IQ decline (premorbid-current IQ difference
ISSN:0022-3956
1879-1379
DOI:10.1016/j.jpsychires.2004.05.002