Auditory Steady-State Response Stimuli based BCI Application - The   Optimization of the Stimuli Types and Lengths
  We propose a method for an improvement of auditory BCI (aBCI) paradigm based on a combination of ASSR stimuli optimization by choosing the subjects' best responses to AM-, flutter-, AM/FM and click-envelope modulated sounds. As the ASSR response features we propose pairwise phase-locking-values calculated from the EEG and next classified using binary classifier to detect attended and ignored stimuli. We also report on a possibility to use the stimuli as short as half a second, which is a step forward in ASSR based aBCI. The presented results are helpful for optimization of the aBCI stimuli for each subject. 
Yoshihiro Matsumoto, Nozomu Nishikawa, Takeshi Yamada, Shoji Makino,   and Tomasz M. Rutkowski
cs.HC q-bio.NC