WAIS-R short forms in chronic schizophrenia

Cd, Missar; Jm, Gold; Te, Goldberg

doi:10.1016/0920-9964(94)90034-5

Cited by 45 publications

(34 citation statements)

References 7 publications

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“…The test involves timed non-verbal problem-solving. Participants were also evaluated on a short version of the Wechsler Adult Intelligence Scale (WAIS-R) (Wechsler, 1981; see also Kaufman, 1990;Missar et al 1994). The substantial drop in intelligence from estimated pre-morbid function is often reported in schizophrenia (Weickert et al 2000).…”

Section: Methods Participantsmentioning

confidence: 99%

Duration judgements in patients with schizophrenia

et al. 2003

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Background. The ability to encode time cues underlies many cognitive processes. In the light of schizophrenic patients' compromised cognitive abilities in a variety of domains, it is noteworthy that there are numerous reports of these patients displaying impaired timing abilities. However, the timing intervals that patients have been evaluated on in prior studies vary considerably in magnitude (e.g. 1 s, 1 min, 1 h etc.).

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Section: Methods Participantsmentioning

confidence: 99%

Duration judgements in patients with schizophrenia

et al. 2003

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“…The first was a test of reading proficiency, the Wide Range Achievement Test-Revised (WRAT-R; Jastak & Wilkinson, 1984), which is widely used as a putative measure of premorbid intellectual functioning (Goldberg et al, 1995;Kremen et al, 1996;Wiens, Bryan, & Crossen, 1993). The second was a short version of the Wechsler Adult Intelligence Scale-Revised (WAIS-R; Wechsler, 1981; see also, Kaufman, 1990;Missar, Gold, & Goldberg, 1994). The third was a standard test of current nonverbal or fluid intelligence, Cattell's Culture Fair Intelligence Test (Cattell, 1971; Institute for Personality and Ability Testing, 1973), Scale 2, Form A.…”

Section: Participants and Baseline Testsmentioning

confidence: 99%

Identification of Tone Duration, Line Length, and Letter Position: An Experimental Approach to Timing and Working Memory Deficits in Schizophrenia.

Elvevåg

Brown

McCormack³

et al. 2004

Journal of Abnormal Psychology

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Patients with schizophrenia display numerous cognitive deficits, including problems in working memory, time estimation, and absolute identification of stimuli. Research in these fields has traditionally been conducted independently. We examined these cognitive processes using tasks that are structurally similar and that yield rich error data. Relative to healthy control participants (n ϭ 20), patients with schizophrenia (n ϭ 20) were impaired on a duration identification task and a probed-recall memory task but not on a line-length identification task. These findings do not support the notion of a global impairment in absolute identification in schizophrenia. However, the authors suggest that some aspect of temporal information processing is indeed disturbed in schizophrenia.

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“…The Reading subsection of the WRAT-R has been demonstrated to be an indicator of premorbid intellectual abilities in previous studies (Nelson and McKenna 1975;Nelson and O'Connell 1978;Dalby and Williams 1986;Nelson et al 1990;Frith et al 1991;Kremen et al 1996). The four-subsection version of the WAIS-R used to obtain estimated FSIQ was composed of Arithmetic, Similarities, Picture Completion, and Digit Symbol Substitution subsections (Missar et al 1994). Additionally, the Wisconsin Card Sorting Test (WCST) was administered to a subset of 14 patients and 14 matched controls as a test of Executive function (Milner 1963).…”

Section: Measures Of General Cognitive Abilities and Executive Functionmentioning

confidence: 99%

Habit and Skill Learning in Schizophrenia: Evidence of Normal Striatal Processing With Abnormal Cortical Input

et al. 2002

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Different forms of nondeclarative learning involve regionally specific striatal circuits. The motor circuit (involving the putamen) has been associated with motor-skill learning and the dorsolateral prefrontal cortex (DLPFC) circuit (involving the caudate) has been associated with cognitive-habit learning. Efforts to differentiate functional striatal circuits within patient samples have been limited. Previous studies have provided mixed results regarding striatal-dependent nondeclarative learning deficits in patients with schizophrenia. In this study, a cognitive-habit learning task (probabilistic weather prediction) was used to assess the DLPFC circuit and a motor-skill learning task (pursuit rotor) was used to assess the motor circuit in 35 patients with schizophrenia and 35 normal controls. Patients with schizophrenia displayed significant performance differences from controls on both nondeclarative tasks; however, cognitive-habit learning rate in patients did not differ from controls. There were performance and learning-rate differences on the motor-skill learning task between the whole sample of patients and controls, however, analysis of a subset of patients and controls matched on general intellectual level eliminated learning rate differences between groups. The abnormal performance offset between patients with schizophrenia and controls in the absence of learning rate differences suggests that abnormal cortical processing provides altered input to normal striatal circuitry.

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WAIS-R short forms in chronic schizophrenia

Cited by 45 publications

References 7 publications

Duration judgements in patients with schizophrenia

Duration judgements in patients with schizophrenia

Identification of Tone Duration, Line Length, and Letter Position: An Experimental Approach to Timing and Working Memory Deficits in Schizophrenia.

Habit and Skill Learning in Schizophrenia: Evidence of Normal Striatal Processing With Abnormal Cortical Input

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