Yoo, Hyunsoo
(2018)
PROCESSING SPEED AMONG ADULT STROKE SURVIVORS WITH LEFT-HEMISPHERE DAMAGE WITH AND WITHOUT APHASIA AND NORMAL HEALTHY CONTROLS.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
This is the latest version of this item.
Abstract
The primary goal of this study was to explore whether slow processing speed in people with aphasia (PWA) is specific to this language disordered population. Based on the two different perspectives of general slowing and reduced processing speed, the information processing speed was explored using reaction time (RT) data.
Are there significant differences in the average RT per item among the average of the three identified nonlinguistic tasks and the average of the three identified linguistic tasks among the PWA, LHD and NHC groups?
Results: The results of the mixed effects model revealed significant main effects for groups and domains, and no significant interactions among groups or domains. The two brain-damaged groups (PWA and LHD) produced significantly longer reaction times across tasks than the NHC group. The PWA groups’ reaction times were significantly longer than the LHD group across simple perceptual and more cognitively complex tasks except for the CRTT-RT1-3 sensory-motor tasks.
Conclusion: Aphasia-additive slowing, as well as left-hemisphere damage-related slowing was demonstrated as evidence by significant differences between the two brain-damaged groups and the NHC group. Therefore, the observed slowing in the PWA group appears to be due to both aphasia-additive and brain-damaged related slowing. Domain-specificity was not observed as significant slowing occurred in both linguistic and nonlinguistic tasks in both brain-damaged groups.
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Details
| Item Type: |
University of Pittsburgh ETD
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| Status: |
Unpublished |
| Creators/Authors: |
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| ETD Committee: |
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| Date: |
10 January 2018 |
| Date Type: |
Publication |
| Defense Date: |
26 September 2017 |
| Approval Date: |
10 January 2018 |
| Submission Date: |
30 November 2017 |
| Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
| Number of Pages: |
147 |
| Institution: |
University of Pittsburgh |
| Schools and Programs: |
School of Health and Rehabilitation Sciences > Communication Science and Disorders |
| Degree: |
PhD - Doctor of Philosophy |
| Thesis Type: |
Doctoral Dissertation |
| Refereed: |
Yes |
| Uncontrolled Keywords: |
Aphasia, Processing speed, Aphasia-additive slowing, Brain-damage related slowing, Domain-specificity |
| Date Deposited: |
10 Jan 2018 15:13 |
| Last Modified: |
10 Jan 2018 15:13 |
| URI: |
http://d-scholarship.pitt.edu/id/eprint/33613 |
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