Towards a Simplified Audio Setup of a BCI-based Language Training Paradigm: a Behavioral Study
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2022-07-04
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en
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Brain-computer interface (BCI) systems use brain signals to create a communication link
between the brain and an external device. Auditory BCIs detect focused attention on
acoustic stimuli based on event-related potentials (ERPs) in signals from
electroencephalography. A recent study by Musso et al. (2022) investigated the use of an
auditory BCI for aphasia rehabilitation in stroke patients. Musso et al. propose a new
BCI-based language training paradigm that reinforces effective language processing
strategies through brain-state-dependent feedback. The paradigm uses a ring of six
loudspeakers for the spatial presentation of stimuli which has been shown to improve
classification accuracy in auditory BCI paradigms. However, this setup is not feasible for
everyday BCI usage. Thus, the present study aims to investigate the possibility of a
simplified audio setup using stereo headphones. The proposed setup will be evaluated by
conducting a behavioral study and assessing the workload and ergonomic ratings. Eight
healthy participants were tested in a within-subject design using four audio conditions: six
loudspeakers, stereo headphones, stereo headphones incorporating pitch and mono
headphones. Results show the two stereo headphone conditions are comparable to the six
loudspeaker condition in terms of counting accuracy, workload ratings and ergonomic
ratings. This indicates that a spatial headphone paradigm might be a promising compromise
between the goal of high classification accuracy and easy applicability for everyday BCI use.
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Faculteit der Sociale Wetenschappen