Psychophysical Responses Comparison in Spatial Visual, Audiovisual, and Auditory BCI-Spelling Paradigms
This addresses the problem of improving BCI accessibility for users with visual impairments by exploring auditory alternatives, though it is incremental as it builds on existing BCI paradigms.
The study compared spatial visual, audiovisual, and auditory BCI-spelling paradigms in a pilot with healthy subjects, finding that the spatial auditory-only paradigm performed as well as traditional visual and audiovisual tasks in terms of response accuracy.
The paper presents a pilot study conducted with spatial visual, audiovisual and auditory brain-computer-interface (BCI) based speller paradigms. The psychophysical experiments are conducted with healthy subjects in order to evaluate a difficulty and a possible response accuracy variability. We also present preliminary EEG results in offline BCI mode. The obtained results validate a thesis, that spatial auditory only paradigm performs as good as the traditional visual and audiovisual speller BCI tasks.