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Title: The measurement and impact of five personality changes after brain injury
Author: Hyde, C. J.
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 2006
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Changes in personality following brain injury are common. Five of the most frequently reported changes are disinhibition, increased impulsivity, poor social perception, poor emotional regulation and low motivation. A review of the literature suggests a lack of measures for these changes and little information on either their conceptual nature of their impact on long term outcome. Part 1 of this study involved developing self and informant versions of five new questionnaires to measure these changes. Seventy two participants with a severe acquired brain injury were recruited through five brain injury rehabilitation services. They and a close relative were asked to complete a battery of tests at Time 1 and again at Time 2, one year later, including the new questionnaires. All five new questionnaires demonstrated excellent test-retest, split-half and inter-rater reliability. Internal consistencies for all five questionnaires were also high. Concurrent and construct validity were assessed against existing measures. Comparisons with neuropsychological tests revealed few significant relationships, suggesting that these changes may often be overlooked . Inter correlations between the five variables suggested strong relationships between all five changes. Part 2 of the study employed the new questionnaires to assess the impact of the five changes on outcome at one year follow-up. Results suggested that four of the five personality changes were able to predict outcome to a greater extent than cognitive ability. Severity of injury was not found to be a significant predictor. Motivation was the strongest predictor, which together with cognitive ability accounted for 41% of variance in outcome on an independently rated measure. Results suggest that changes in personality are important determinants of outcome for brain injury survivors. With further refinement these new questionnaires could become clinically useful assessment tools, which could help guide rehabilitation and offer more accurate long term prognoses.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available