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Examining Online Syntactic Processing of Spoken Complex Sentences in Chinese Using Dual-Modal Interference Tasks
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Grammatical processing in schizophrenia: evidence from morphology.

Matthew Walenski1, Thomas W Weickert, Christopher J Maloof

  • 1Department of Psychology, University of California San Diego, 9500 Gilman Drive MC 0109, La Jolla, CA 92093-0109, USA. mwalenski@ucsd.edu

Neuropsychologia
|September 22, 2009
PubMed
Summary
This summary is machine-generated.

This study reveals that individuals with schizophrenia exhibit grammatical deficits, particularly in producing regular and novel verb past tenses. Irregular verb forms were relatively preserved, suggesting a specific impairment in schizophrenia language processing.

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Area of Science:

  • Psycholinguistics
  • Neuroscience of Language
  • Clinical Psychology

Background:

  • Schizophrenia is frequently associated with language impairments.
  • Inflectional morphology, the study of word-form changes, is a key area of linguistic function.
  • Understanding specific linguistic deficits in schizophrenia can illuminate the disorder's cognitive underpinnings.

Purpose of the Study:

  • To investigate grammatical deficits in schizophrenia, specifically focusing on inflectional morphology.
  • To examine the production of past tenses for regular, irregular, and novel English verbs in patients with schizophrenia.
  • To explore the relationship between thought disorder severity and grammatical performance in schizophrenia.

Main Methods:

  • Compared past-tense verb production in 43 patients with schizophrenia and 42 healthy controls.
  • Assessed regular (e.g., slip), irregular (e.g., swim), and novel (e.g., plag) verb forms.
  • Controlled for subject- and item-specific factors including IQ and phonological complexity.

Main Results:

  • Patients with schizophrenia showed significant impairments in producing past tenses for regular and novel verbs.
  • Irregular verb past-tense production (e.g., swam) was relatively spared in patients compared to controls.
  • Thought disorder scores positively correlated with impairments in regular and novel verb past-tense production.

Conclusions:

  • Schizophrenia is associated with specific grammatical deficits, particularly affecting regular and novel inflectional morphology.
  • The findings suggest a relative sparing of lexical memory systems compared to grammatical processing.
  • Thought disorder severity may be linked to grammatical processing impairments in schizophrenia.