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Dual task performance in Huntington's disease: a comparison of choice reaction time tasks

Vaportzis, Ria
; 
Georgiou-Karistianis, N.
; 
Churchyard, A.
; 
Stout, J.C.
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Publication Date
2015-09
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Keywords
Choice RT, Digit tasks, Dual task costs, Huntington's disease, Multiple resources theory
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© 2014 American Psychological Association. This paper is not the copy of record and may not exactly replicate the authoritative document published in the APA journal. Please do not copy or cite without author's permission. The final article is available, upon publication, at: https://doi.org/10.1037/neu0000172
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openAccess
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2014-11-17
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Abstract
Objective: This study investigated whether dual tasks place disproportionately high demands on individuals with Huntington�s disease (HD) compared with controls, and also tested the Multiple Resources Theory. Method: Thirteen HD participants and 13 controls completed two dual?task sets that varied in difficulty and complexity: Set 1 paired simple choice reaction time (RT) with digit forward, and Set 2 paired complex choice RT with digit backward. Results: HD participants were overall slower; however, although they maintained accuracy levels similar to controls in the simple choice RT tasks, their accuracy declined in the complex choice RT tasks. In addition, HD participants were more susceptible to speed�accuracy trade?offs. Despite this, they did not show greater dual?task costs than controls. Conclusions: Overall, the findings do not support the Multiple Resources Theory, but they do provide some support for the Unitary Resource Theory and the attentional?impairment hypothesis.
URI
http://hdl.handle.net/10454/16810
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Accepted manuscript
Citation
Vaportzis E, Georgiou-Karistianis N, Churchyard A et al (2015) Dual task performance in Huntington's disease: a comparison of choice reaction times tasks. Neuropsychology. 29(5): 703-712.
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https://doi.org/10.1037/neu0000172
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Article
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