Overinclusive Thought Disorder in Chronic Schizophrenics and its Response to ‘Proketazine’

Payne, R. W.; Friedlander, D; Laverty, S. G.; Haden, P.

doi:10.1192/bjp.109.461.523

Cited by 28 publications

(16 citation statements)

References 6 publications

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“…The results also throw doubt on the rationale for Payne's practice of summing converted scores based on a proverbs-test word count and number of object-sorting items selected as a partial definition of overinclusion (Payne & Friedlander, 1962;Payne et al, 1963). Since the r's between these variables are very low (.007 in the present paper and -.030 in a population studied by Hawks, 1964), it would seem that the practice is without empirical justification.…”

Section: Resultscontrasting

confidence: 52%

“…Number of Goldstein object-sorting stimuli included was employed on the assumption that this, too, would reflect inability to exclude unnecessary stimuli from a concept. The Payne definitions of overinclusion have also been used extensively in research work on schizophrenic thinking (Payne, Caird, & Laverty, 1964;Payne & Friedlander, 1962;Payne, Friedlander, Laverty, & Haden, 1963;Payne & Hewlett, 1960;Payne, et al, 1959).…”

mentioning

confidence: 99%

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Interrelationships of six overinclusion measures.

Watson¹

1967

Journal of Consulting Psychology

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Section: Resultscontrasting

confidence: 52%

mentioning

confidence: 99%

Interrelationships of six overinclusion measures.

Watson¹

1967

Journal of Consulting Psychology

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“…The effect of phenothiazines on memory tasks (Koh & Kayton, 1974;Koh et al, 1973) and on overinclusion (Payne, Friedlander, Laverty, & Haden, 1963) has been found to be minimal. Hence, patient medication was not controlled.…”

Section: Subjectsmentioning

confidence: 92%

Logical and nonlogical classification systems: A look at the underlying complexity of overinclusion in schizophrenics

Sims‐Knight

Knight

1978

J. Clin. Psychol.

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Although overinclusion is hypothesized to be a thought disorder, it has been found to be related to positive variables – good prognosis, good premorbidity, and good picture recognition. We hypothesized that some overinclusive responses involved an alternative classification system to conventional logical classification and that these alternative systems might facilitate picture recognition performance. Twenty‐seven male schizophrenics were given the Object Classification Test, the Object Sorting Test, and a picture recognition task. In addition to standard measures of overinclusion, responses were categorized according to (a) extent to which objects were classified consistently and exhaustively by common attributes; and (b) adequacy of the common attributes employed. Four separable kinds of responses were found: nonlogical classification, reclassification (ability to change the basis of sorting), classification that engages the logical task, but does so imperfectly (logical approximates), and overextensiveness (making an overly general, nonexclusive category). Only the first two were related positively to recognition performance. These results suggest that overinclusion measures several different response tendencies and that some of them, but not all, help schizophrenics to compensate for their disorder.

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“…The question of medication has been inconsistently tackled in previous studies of overinclusion. Some failed to take it into account (Foulds et al, 1967;Andreasen and Powers, 1974) while others, who did recognize the importance of a drug-free interval, either failed to specify it (Payne et al, 1972) or used an inadequate interval (Payne et al, 1963). A previous study of the effects of phenothiazines on overinclusive thinking, measured by performance on a proverbs test (Chapman et al, 1975) found that overinclusiveness was reduced in some patients (though increased in others) by drug withdrawal.…”

Section: Discussionmentioning

confidence: 94%

Object-name selection in psychiatric patients before and after neuroleptic therapy

et al. 1990

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An object-name selection test was administered to 16 newly admitted schizo phrenic, non-schizophrenic psychotic and non-psychotic patients on admission when they were drug-free, and again 4-6 weeks later, following treatment with neuroleptics. Sixteen healthy, drug-free age-matched and sex-matched controls were similarly tested on two occasions 4-6 weeks apart. Schizophrenic and non-schizophrenic psychotic subjects made significantly more association-type errors than non-psychotic subjects and controls. A signifi cant reduction in association-type errors which was observed in both psychotic patient groups on the second testing occasion may be attributed to medication. The data suggest that overinclusive thinking, as measured by the object-name selection test, is a feature of both schizophrenic and non-schizophrenic psychosis. It is concluded that tests of overinclusion are therefore of limited diagnostic utility although they may be of value in monitoring response to treatment.

show abstract

Overinclusive Thought Disorder in Chronic Schizophrenics and its Response to ‘Proketazine’

Cited by 28 publications

References 6 publications

Interrelationships of six overinclusion measures.

Interrelationships of six overinclusion measures.

Logical and nonlogical classification systems: A look at the underlying complexity of overinclusion in schizophrenics

Object-name selection in psychiatric patients before and after neuroleptic therapy

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