Span of apprehension in schizophrenic patients as a function of distractor masking and laterality.

The effects of hemispheric laterality on a forced-choice Span of Apprehension (SoA) task were investigated. Forty-eight adult schizophrenic inpatients were recruited. A control group of healthy subjects was put together using the matched-pairs method with age, gender, and education as control variables. SoA performance was determined separately for the left and right visual field (VF), respectively. No SoA group differences were found; in both groups, the hit percentage was higher in the right VF. However, in the schizophrenic group, the left VF performance showed significant negative correlations with psychopathologic symptoms (especially auditory verbal hallucinations). In a subsample of patients receiving atypical neuroleptic drugs, the daily dosage correlated negatively with left VF performance. In general, young subjects performed better than old subjects (both VFs), males performed better than females, and subjects with high education performed better than subjects with low education (right VF).

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Effects of cerebral hemispheric laterality on the span of apprehension of schizophrenic and healthy subjects

Maß

Schoemig²,

Novikov³

et al. 2001

European Archives of Psychiatry and Clinical Neuroscience

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Preattentive information processing as measured by backward masking and texton detection tasks in adolescents at high genetic risk for schizophrenia

Lieb

Denz

Hess

et al. 1996

Schizophrenia Research

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Early visual information processing deficit in depression with and without Borderline Personality Disorder

Keilp

Klain

Brodsky

et al. 2007

Psychiatry Research

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Backward masking is a measure of early visual information processing usually abnormal in psychotic disorders. Previous studies of subjects with Borderline Personality Disorder have been inconsistent regarding their impairment or lack of impairment on backward masking. We examined visual backward masking performance in samples of unmedicated depressed patients with (n=12) and without (n=16) Borderline Personality Disorder, and healthy volunteers (n=18). Accuracy was poorer in depressed BPD patients, relative to both non-BPD depressed and healthy comparison subjects. As in previous studies, no differences in accuracy were found between non-BPD depressed patients and healthy comparison subjects. Differences in BPD subjects' accuracy were most evident at the fastest ISI and were not attributable to intercurrent psychotic symptoms. Beyond these group differences, accuracy at faster ISI's correlated with self-ratings of impulsiveness in all patients, and may be a general correlate of this trait. Poor early information processing appears to be a feature of Borderline Personality Disorder, and may play a role in the impulsive behavior that is characteristic of the disorder.

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Span of apprehension in schizophrenic patients as a function of distractor masking and laterality.

Cited by 11 publications

References 43 publications

Effects of cerebral hemispheric laterality on the span of apprehension of schizophrenic and healthy subjects

Effects of cerebral hemispheric laterality on the span of apprehension of schizophrenic and healthy subjects

Preattentive information processing as measured by backward masking and texton detection tasks in adolescents at high genetic risk for schizophrenia

Early visual information processing deficit in depression with and without Borderline Personality Disorder

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