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      Modelling difficulties in abstract thinking in psychosis: the importance of socio-developmental background

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          Most cited references 22

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          Massive IQ gains in 14 nations: What IQ tests really measure.

           James Flynn (1987)
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            Searching for a consensus five-factor model of the Positive and Negative Syndrome Scale for schizophrenia.

            Although the developers of the Positive and Negative Syndrome Scale (PANSS) grouped items into three subscales, factor analyses indicate that a five-factor model better characterizes PANSS data. However, lack of consensus on which model to use limits the comparability of PANSS variables across studies. We counted "votes" from published factor analyses to derive consensus models. One of these combined superior fit in our Caucasian sample (n=458, CFI=.970), and in distinct Japanese sample (n=164, CFI=.964), relative to the original three-subscale model, with a sorting of items into factors that was highly consistent across the studies reviewed. Published by Elsevier B.V.
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              Generalizability studies of the Global Assessment of Functioning-Split version.

              The study aimed to use the Generalizability Theory to investigate the reliability and precision of the split version of the Global Assessment of Functioning (GAF). Six case vignettes were assessed by 2 samples; one by 19 experienced and independent raters and another by 58 experienced raters from 8 different day-treatment units, evaluating both symptom and function scores of GAF. Generalizability studies were conducted to disentangle relevant variance components accounting for error variance in GAF scores. Furthermore, decision studies were conducted to estimate the reliability of different measurement designs, as well as precision in terms of error tolerance ratio. Both symptom and function scores of GAF were found to be highly generalizable, and a measurement design of 2 raters per subject was found to be most efficient with respect to reliability, precision, and use of resources. Both symptom and function scores of GAF seem highly consistent across experienced raters.
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                Author and article information

                Journal
                Cognitive Neuropsychiatry
                Cognitive Neuropsychiatry
                Informa UK Limited
                1354-6805
                1464-0619
                November 22 2016
                January 02 2017
                December 22 2016
                January 02 2017
                : 22
                : 1
                : 39-52
                Affiliations
                [1 ] NORMENT – K.G. Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
                [2 ] NORMENT, Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway
                [3 ] Prostate Cancer Research Group, Centre for Molecular Medicine Norway, Nordic EMBL Partnership, University of Oslo and Oslo University Hospital, Oslo, Norway
                [4 ] European Molecular Biology Laboratory, European Bioinformatics Institute, Cambridge, UK
                [5 ] Department of Psychology, University of Oslo, Oslo, Norway
                Article
                10.1080/13546805.2016.1259998
                © 2017

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