Discourse Disorder in Right Hemisphere Brain Damaged Patients: Evidence from Relative Clause Processing

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Arianpour Mahla

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Journal Paper

Paper Information

Journal: Journal of Language Research Year:2023 | Volume:13 | Issue:2 Page(s): 1-22

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Title

Discourse Disorder in Right Hemisphere Brain Damaged Patients: Evidence from Relative Clause Processing

Author(s)

Arianpour Mahla | Issue Writer Certificate

Keywords

neurolinguistics

right hemisphere damage

discourse disorder

relative clauses

Abstract

Based on clinical observations, it has been determined that damage to the right hemisphere may cause some communication disorders. These non-aphasic communication disorders lead to impairments in the pragmatic, prosodic, lexical-semantic and discourse aspects of language that affect social participation. In right hemisphere damaged patients (RHD), discourse may be affected at both the perceptual and expressive levels. right hemisphere damage can affect language-related skills. The present study aimed to investigate discourse disorder in adults with right hemisphere brain damage through the processing of relative clauses. The research is descriptive-analytical and quantitative. The statistical population included 10 healthy adults and 10 Persian-speaking adults with right hemisphere damage, who were selected in a convenience sampling way. The research tests included screening tests and tests for measuring the processing speed of relative constructions, which were done through DMDX software. Data analysis was done by the statistical methods such as variance analysis, independent t-test of two independent groups, and paired sample t-test. In subject relative constructions, the difference in processing speed of categories, relative clauses and relative sentences between the two experimental and control groups was not significant (P>0.05); However, in the object relative constructions, this difference in processing speed between the two experimental and control groups was significant (P<0.05). In subject and object constructions preceded by an initial context, the difference in processing speed of categories, clauses and sentences between the two experimental and control groups was significant (P<0.05). In the experimental group, the difference in processing speed of subject and object relative clauses and sentences with and without an initial context was significant (P<0.05). The research findings provide evidence for the negative effect of right hemisphere brain damage on discourse skills. Likewise, people with right hemisphere brain damage have more difficulty in processing complex language constructions referential items such as relative constructions compared to healthy peers.

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