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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.
Vaportzis, Ria
Georgiou-Karistianis, N.
Churchyard, A.
Stout, J.C.
Publication Date
2015-09
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©American Psychological Association, 2014. 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: http://dx.doi.org/10.1037/neu0000172
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2014-11-17
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Abstract
Objective: This study investigated whether dual tasks make disproportionately high demands in Huntington’s disease (HD) compared with controls, and also tested the Multiple Resources Theory. Method:
Thirteen HD participants and 13 controls completed 2 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: We found that HD participants were overall slower; however,
although they maintained similar levels of accuracy in the simple choice RT tasks with controls, their
accuracy decreased in the complex choice RT tasks. In addition, we found that HD participants were
more susceptible to speed-accuracy trade-offs. Despite that, they did not show greater dual task costs than
controls. Conclusions: Overall, our findings do not support the Multiple Resources Theory, but they do
provide some support for the Unitary Resource Theory and the attentional impairment hypothesis.
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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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