A comparison of cognitive structure in schizophrenia patients and healthy controls using confirmatory factor analysis.
paper
Cited
Public
Unavailable
- Authors
- Dickinson, Dwight; Ragland, J Daniel; Calkins, Monica E; Gold, James M; Gur, Ruben C
- Year
- 2006
- Journal
- Schizophrenia research
- PMID
- 16616831
- DOI
- 10.1016/j.schres.2006.03.003
- PMCID
- PMC4332573
There is evidence that cognitive task performance breaks down into the same broad domains in schizophrenia as in healthy populations. However, this does not mean that the domains are independent of one another or that the interrelationships among domains are the same between groups. We used confirmatory factor analysis (CFA) to compare the latent structure of a broad neuropsychological battery in schizophrenia patients (n = 148) and healthy controls (n = 157). Main analyses examined the fit of a hierarchical six-factor model, in which associations among the factors were assumed to reflect their strong shared relationship to a general cognitive ability factor. The model incorporated the factors of verbal comprehension, perceptual organization, verbal memory, spatial memory, processing speed, and executive/working memory. The hierarchical model provided a good overall fit to data from both groups. However multiple groups CFA revealed significant differences in factor loadings between groups, reflecting a more generalized latent structure of cognitive ability in schizophrenia. This was also evident in higher bivariate correlations among cognitive domain composite scores calculated from the observed test data. Cognitive ability, as reflected in test performance, appears to be more unitary in schizophrenia than in healthy subjects. This finding may have measurement and treatment implications.
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