Behavior Research Methods, Instruments, & Computers 1997.29 (3).337-345 Design and operation of an EEG-based brain-computer interface with digital signal processing technology DENNISJ. McFARLAND, A. TODDLEFKOWICZ, and JONATHAN R. WOLPAW Wadsworth Centerfor Laboratories and Research, New York State Department ofHealth and State University ofNew York,Albany, New York Weare developing an electroencep