Manipulating hemispheric attentional mechanisms to modulate word retrieval in aphasia

van Hees, Sophia J., Smith, Erin R. and Copland, David A. (2011) Manipulating hemispheric attentional mechanisms to modulate word retrieval in aphasia. Aphasiology, 25 12: 1469-1487. doi:10.1080/02687038.2011.583989


Author van Hees, Sophia J.
Smith, Erin R.
Copland, David A.
Title Manipulating hemispheric attentional mechanisms to modulate word retrieval in aphasia
Journal name Aphasiology   Check publisher's open access policy
ISSN 0268-7038
1464-5041
Publication date 2011-01-01
Sub-type Article (original research)
DOI 10.1080/02687038.2011.583989
Volume 25
Issue 12
Start page 1469
End page 1487
Total pages 19
Place of publication Colchester, Essex, United Kingdom
Publisher Psychology Press
Collection year 2012
Language eng
Formatted abstract
Background: Emerging evidence suggests that left hemisphere damage may create an attentional bias towards stimuli initially processed in the right hemisphere.
Aims: The current study aimed to investigate whether this hemispheric attentional bias influences spoken word production in a picture–word interference task.
Methods & Procedures: Two participants with aphasia and seven healthy controls named centrally presented pictures that were preceded by a distractor word which appeared in
either the left or right visual field 200 ms prior to the picture. Distractor words were semantically related, phonologically related, unrelated, or the name of the picture. Results
were analysed in terms of response times and accuracy.
Outcomes & Results: A greater overall facilitation effect was found in the left visual field/right hemisphere condition for both participants with aphasia, however this varied depending on distractor condition. These results are consistent with an attentional bias towards linguistic stimuli initially presented to the right hemisphere. In contrast, the results of the control group suggest a reduction in the lateralisation of language processing to the left hemisphere in healthy ageing.
Conclusions: These results suggest that spoken word production may be influenced by changes in attentional mechanisms following left hemisphere damage in aphasia, as well as changes in hemispheric lateralisation and inhibition in healthy ageing. Identifying attentional conditions that optimise language performance in aphasia may have implications
for new treatments in language rehabilitation.
©2011 Psychology Press, an imprint of the Taylor & Francis Group, an Informa business
Keyword Anomia
Stroke
Rehabilitation
Divided visual dield
Hemispace
Picture–word interference
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 05 Dec 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: UQ Centre for Clinical Research Publications
Official 2012 Collection
School of Health and Rehabilitation Sciences Publications
 
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Created: Thu, 20 Oct 2011, 22:08:08 EST by Ms Sophia Van Hees on behalf of School of Health & Rehabilitation Sciences