Abstract
Using Brain Computer Interfaces (BCIs), one can establish a communication pathway which does not rely on muscular activity. This is a promising tool for patients suffering from neurodegenerative diseases as well as for patients with locked-in syndrome. Neural degenerative diseases such as Amyotrophic Lateral Sclerosis (ALS) also cause a deterioration of vision, in particular a loss of gaze fixation. Since visual BCI paradigms might not be suitable for these patients [1], auditory speller paradigms were recently investigated [2-4]. Spatial hearing has been introduced as informative cue in a BCI paradigm [2], revealing that subjects are able to focus attention to a target direction. Two online studies were performed to investigate the usability of speller paradigms with spatial auditory cues.
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