Action (verb) fluency deficits in schizophrenia spectrum disorders: linking language, cognition and interpersonal functioning

Daria Smirnova, Melanie Clark, Assen Jablensky, Johanna C. Badcock

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    Deficits in action (verb) fluency have previously been reported in schizophrenia spectrum disorders. The degree to which this reflects difficulties generating verbs in different semantic categories is unknown. Here, action fluency responses of 46 patients with schizophrenia spectrum disorders and 76 healthy controls were classified as action or mental state verbs, using well-established taxonomies. The word length, frequency, age of acquisition, valence and concreteness of the verbs produced were also examined. Participants also completed measures of cognitive function, and clinical symptoms. Independent inter-rater agreement of semantic categorization was high. The percentage of action verbs produced was significantly lower in patients than controls, whilst the percentage of mental state verbs produced did not differ. Patients’ action verbs were: significantly less concrete; positively correlated with memory and intelligence; and negatively correlated with interpersonal symptoms. Impaired action verb, but intact mental state verb generation is consistent with the neural separability of these processes.

    Original languageEnglish
    Pages (from-to)203-211
    Number of pages9
    JournalPsychiatry Research
    Volume257
    Early online date25 Jul 2017
    DOIs
    Publication statusPublished - Nov 2017

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