title: Toward a gaze-independent matrix speller brain-computer interface.
authors.forename: Peter
authors.initials: P
authors.lastname: Brunner
authors.forename: Gerwin
authors.initials: G
authors.lastname: Schalk
mesh_terms: D001288:Attention / Q000502:physiology*; D001921:Brain / Q000502:physiology*; D005403:Fixation, Ocular / Q000502:physiology*; D006801:Humans; D014584:User-Computer Interface