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The relationship of story grammar and executive function following TBI

Mozeiko, Jennifer and Le, Karen and Coelho, Carl and Krueger, Frank and Grafman, Jordan
The relationship of story grammar and executive function following TBI. Aphasiology, 25(6-7), 2011, pages 826-835.

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Abstract

Background: Story grammar is a super-structural measure of discourse performance that has shown to be sensitive to the deficits seen following traumatic brain injury (TBI). Narrative organisation and identification of logical relationships between events and characters are key components of story grammar. Reports of significant correlations for measures of story grammar and scores from various tests of executive functioning for individuals with TBI are thought to reflect executive control of cognitive and linguistic organisational processes.

Aims: The purpose of the present study was to re-examine the relationship between story grammar and executive functions (EF) in a large group of participants with severe TBI secondary to diverse penetrating head wounds. It was hypothesised that participants with TBI would have significantly lower story grammar scores than a comparison group without TBI, and that story grammar performance of the group with TBI would be significantly correlated with their EF scores.

Methods & Procedures: A total of 167 participants with TBI and a comparison group of 46 adults without TBI were asked to retell a 16-frame story. Transcripts of each story retelling were broken into T-units and were analysed for story grammar.

Outcomes & Results: Results of MANOVA showed significant effect of group on the discourse measures. Univariate tests showed significant differences between the group with TBI and the comparison group for each of the story grammar measures. Story grammar measures were significantly correlated with executive function (EF) scores.

Conclusions: Results indicated that the participants with TBI demonstrated significantly poorer performance on measures of story grammar abilities, lending support to earlier reports of story grammar impairments resulting from closed head injury (CHI). The present study also found significant correlations for measures of story grammar and the Sorting Test. Cognitive skills such as mental flexibility, required for successful performance on this card sorting task are likely the same as those required for episode generation. These findings have clinical implications for the management of cognitive-communication disorders in individuals with TBI. First, story grammar warrants inclusion in analyses of discourse. Second, discourse deficits following brain injury do not resolve spontaneously and persist as social barriers.

EPrint Type:Journal (Paginated)
Keywords:Traumatic brain injury, penetrating head injury, Discourse analysis, narrative discourse, Story grammar, Executive function
Subjects:UNSPECIFIED
ID Code:2238
Conference:Clinical Aphasiology Conference: Clinical Aphasiology Conference (2010 : 40th : Isle of Palms, SC : May 23-27, 2010)
Publication:Aphasiology
Volume:25
Number:6-7
Pages:826-835
Alternative Locations:http://dx.doi.org/10.1080/02687038.2010.543983
DOI or Unique Handle:10.1080/02687038.2010.543983
Additional Information:This article is based on a paper originally presented at the CAC2010 Conference. Permission to view the full-text article is subject to the publisher's access restrictions.

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