Language processing and memory in ill and well siblings from multiplex families affected with schizophrenia

Schizophrenia Research
K ShedlackL E DeLisi

Abstract

The present study was designed to extend the investigation of genetic factors for schizophrenia to cognitive and linguistic signs of central nervous system dysfunction. Of 51 siblings studied from 19 schizophrenia multiplex families, 37 had a DSM-III-R diagnosis of schizophrenia or related schzophrenia spectrum disorder and 14 were well. Controls were 17 unrelated healthy individuals within the same social class and age range. Subjects were tested on measures of memory, attention, reading and expressive language ability. Schizophrenic and spectrum disorder siblings were significantly more impaired in tests of auditory discrimination and memory than their well siblings or controls and displayed significantly reduced syntactic complexity to their speech. While well siblings did not differ from controls on most measures, some aspects of language complexity were reduced. A familial effect was observed for tests of reading ability, attention, some syntactic measures, and short-term memory, although these were not the measures that distinguished patients from controls in this cohort, the scores were not correlated among the ill sibling pairs, and poorer scores did not segregate with schizophrenia within these families. Thus, while so...Continue Reading

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American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics : the Official Publication of the International Society of Psychiatric Genetics
A L HoffL E DeLisi
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