Grammatical and Semantic Acceptability of Utterance Texts of Patients Diagnosed with Paranoid Schizophrenia. A Research Report

The present study compared utterance texts of healthy individuals and individuals suffering from paranoid schizophrenia, by using a purpose-built Grammatico-Semantic Acceptability Quotient which examined the degree of linguistic acceptability of analyzed sentences. The study involved 130 hospitalized psychiatric patients diagnosed with paranoid schizophrenia and 130 healthy individuals. The study yielded the biggest so far corpus of marked utterance texts of schizophrenic patients in the Polish language. A total of 11,414 sentences were isolated, 7,180 of which were produced by individuals suffering from schizophrenia. The level of their acceptability was found to be considerably lower, especially in the case of sentences produced by patients with positive type schizophrenia.