Research Papers

Usability and performance-informed selection of personalized mental tasks for an online near-infrared spectroscopy brain-computer interface

[+] Author Affiliations
Sabine Weyand, Larissa Schudlo, Tom Chau

Bloorview Research Institute, Holland Bloorview Kids Rehabilitation Hospital, Toronto, Ontario M4G 1R8, Canada

University of Toronto, Institute of Biomaterials and Biomedical Engineering, Ontario M5S 3G9, Canada

Kaori Takehara-Nishiuchi

University of Toronto, Department of Psychology, Ontario M5S 3G3, Canada

Neurophoton. 2(2), 025001 (May 12, 2015). doi:10.1117/1.NPh.2.2.025001
History: Received January 13, 2015; Accepted April 10, 2015
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Abstract.  Brain–computer interfaces (BCIs) allow individuals to use only cognitive activities to interact with their environment. The widespread use of BCIs is limited, due in part to their lack of user-friendliness. The main goal of this work was to develop a more user-centered BCI and determine if: (1) individuals can acquire control of an online near-infrared spectroscopy BCI via usability and performance-informed selection of mental tasks without compromising classification accuracy and (2) the combination of usability and performance-informed selection of mental tasks yields subjective ease-of-use ratings that exceed those attainable with prescribed mental tasks. Twenty able-bodied participants were recruited. Half of the participants served as a control group, using the state-of-the-art prescribed mental strategies. The other half of the participants comprised the study group, choosing their own personalized mental strategies out of eleven possible tasks. It was concluded that users were, in fact, able to acquire control of the more user-centered BCI without a significant change in accuracy compared to the prescribed task BCI. Furthermore, the personalized BCI yielded higher subjective ease-of-use ratings than the prescribed BCI. Average online accuracies of 77±12.9% and 73±12.9% were achieved by the personalized and prescribed mental task groups, respectively.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Sabine Weyand ; Larissa Schudlo ; Kaori Takehara-Nishiuchi and Tom Chau
"Usability and performance-informed selection of personalized mental tasks for an online near-infrared spectroscopy brain-computer interface", Neurophoton. 2(2), 025001 (May 12, 2015). ; http://dx.doi.org/10.1117/1.NPh.2.2.025001


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