Reference Performance and Positive and Negative Thought Disorder: A Follow-Up Study of Manics and Schizophrenics

Nancy Docherty, Margo Schnur, Philip D. Harvey

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

Manic (n = 22) and schizophrenic (n = 28) patients were examined with clinical and linguistic measures of language performance at an acute admission and at a follow-up. It was found that the frequency of incompetent references and the severity of negative thought disorder were stable independent traits of schizophrenics. Furthermore, low levels of verbal productivity, indexed both clinically and linguistically, predicted the likelihood that schizophrenic subjects would be psychotic at follow-up. The language performance of manic patients was not temporally stable, although high levels of reference failures at index predicted psychosis at follow-up. These results are evaluated in terms of their implications for differentiating state-specific aspects of speech competence from potential vulnerability markers in these two types of patients.

Original languageEnglish (US)
Pages (from-to)437-442
Number of pages6
JournalJournal of abnormal psychology
Volume97
Issue number4
DOIs
StatePublished - Nov 1988
Externally publishedYes

ASJC Scopus subject areas

  • Psychiatry and Mental health
  • Biological Psychiatry

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