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Semantic Network Disorder in Schizophrenia: Semantic Priming with Simultaneous Presentation of two Primes

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Author(s): H. R. Naghavi | V. Sharifi | R. Kormi-Nouri

Journal: Iranian Journal of Psychiatry and Clinical Psychology
ISSN 1735-4315

Volume: 8;
Issue: 3;
Start page: 43;
Date: 2003;
Original page

Keywords: semantic priming | schizophrenia | automatic processes

ABSTRACT
Abstract Objectives: The present study was designed to investigate the automatic activation of seman-tic priming in schizophrenic patients. Method: 36 schizophrenic patients and 36 normal sub-jects participated in two experiments. In experiment one, the effect of semantic relation on iden- tification of degraded targets was examined between a series of single prime words and single target words presented in a typical semantic priming paradigm. To restrict the priming to au-tomatic processes, in experiment two, series of two primes were presented simultaneously instead of one. Both primes were related to the target, and the effect of semantic relation between two primes on identification of degraded targets was examined. Finding: In experi-ment one, both groups demonstrated semantic priming effect for related words there was no significant difference between the two groups. In experiment two, semantic relation between two primes resulted in a significant priming effect in normal subjects, but not in schizophrenic patients. Results: This study showed that schizophrenic subjects have difficulties in automa-tically activating related words in their semantic networks. Restricting semantic priming to automatic processes can suggest a way to resolve the inconsistencies in studies with schizo-phrenic subjects. 

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