Intra- and interhemispheric information processing in schizophrenia.

Walker, Elaine F.; McGuire, Michael P.

doi:10.1037/0033-2909.92.3.701

Cited by 110 publications

(37 citation statements)

References 118 publications

(141 reference statements)

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“…Green & Kotenko's findings have been cited as support for theories proposing the existence of left hemisphere overactivation and/or dysfunction among schizophrenic patients (e.g. Walker & McGuire, 1982). The data from this study are not generally consistent with such theories.…”

Section: Discussioncontrasting

confidence: 90%

“…Green & Kotenko, 1980) which reported the superiority of right ear processing of verbal stimuli in comparison with both left and binaural presentations among schizophrenic subjects. However, Walker & McGuire (1982) have suggested that this right ear superiority among schizophrenic subjects may result from their difficulty in ignoring the non-target stimuli in the right ear when the target occurs in the left ear. It should be noted here, both that Green & Kotenko used monaural stimulation and that the response requirements were much more complex than those of the study reported here.…”

Section: Discussionmentioning

confidence: 99%

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Consideration of pigeon‐holing and filtering as dysfunctional attention strategies in schizophrenia

Harris

Benedict

Leek

1990

British J Clinic Psychol

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Difficulties in the use of both filtering and pigeon-holing strategies have been suggested as partial explanations for the information processing deficits typically noted with schizophrenic subjects. The study reported here examined the operation of both of these attentional strategies in a group of schizophrenic subjects and in a group of psychiatric control subjects. Subjects were asked to identify a target syllable in the presence of several levels of competing speech. A sensory filter could be profitably invoked when the target and the competing speech were presented to separate ears. Pigeon-holing was assumed to facilitate performance when both the target and the competition occurred in both ears. Results suggested that schizophrenic subjects are relatively efficient in using filtering strategies, but have more difficulty employing pigeon-holing strategies to allocate efficiently attentional resources.

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Section: Discussioncontrasting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Consideration of pigeon‐holing and filtering as dysfunctional attention strategies in schizophrenia

Harris

Benedict

Leek

1990

British J Clinic Psychol

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“…Opinions have differed as to how these results should be interpreted (see Walker & McGuire, 1982, for a review) but one possible explanation for abnormal degrees of lateral asymmetry in schizophrenics is that the two hemispheres have become disconnected or imperfectly coordinated. Thus normal interhemispheric control through neural excitation and inhibition across the corpus callosum is disrupted.…”

mentioning

confidence: 96%

Interhemispheric coordination and focused attention in chronic and acute schizophrenia

Green¹

1985

British J Clinic Psychol

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Groups of chronic and acute schizophrenics, together with controls, were given a story comprehension task where material was presented either binaurally or monaurally. A significant right ear advantage was found in the scores of the acute patients but not in those of chronics or controls. Similarly, acutes, in contrast to all other subjects, demonstrated a binaural performance decrement relative to their preferred ear in the monaural condition. A second experiment showed that acute schizophrenics, in contrast to an earlier finding with chronics, were no better at detecting targets in dichotically presented word lists when the targets occurred in one ear only than when they could occur in either ear. It is suggested that this inability to focus attention on one ear, in the presence of competing stimulation to the other, was responsible for the story comprehension result.

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“…In a similar vein, other investigators have suggested that memory deficits are related to information-processing limitations caused either by an inability to filter out information or by an inherent reduction in processing capacity (Lawson, McGhie, & Chapman, 1964;Nuechterlein & Dawson, 1984;Oltmans, 1978;Walker & McGuire, 1982). Such a reduction in processing capacity, it is argued, accounts for the fact that greater performance deficits are noted for tasks that involve more elaborate encoding (e.g., forming associations between concepts).…”

Section: Discussionmentioning

confidence: 91%

Thought disorder and verbal recall in acutely psychotic patients

Speed¹,

Toner²,

Shugar³

et al. 1991

J. Clin. Psychol.

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This study examined the relationship between thought disorder and verbal recall in schizophrenic, manic, and schizoaffective inpatients. Based on previous research, it was predicted that subjects who demonstrated only positive thought‐disorder would differ from those with positive and negative thought‐disorder in terms of their ability to encode short descriptive passages. Unlike controls, who were able to encode organized material better than unorganized material, neither thought‐disorder group improved its encoding when the material to be remembered was more organized. Both thought‐disorder groups remembered more when the material was less organized. These findings raise a number of issues with regard to the interrelationship among thought disorders, psychiatric diagnoses, and information‐processing deficits.

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Intra- and interhemispheric information processing in schizophrenia.

Cited by 110 publications

References 118 publications

Consideration of pigeon‐holing and filtering as dysfunctional attention strategies in schizophrenia

Consideration of pigeon‐holing and filtering as dysfunctional attention strategies in schizophrenia

Interhemispheric coordination and focused attention in chronic and acute schizophrenia

Thought disorder and verbal recall in acutely psychotic patients

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