This research for the Brain and Cognitive Sciences Department was conducted within the Department of Media Arts and Sciences. I wish to thank Jennifer Healey, with whom I conducted the numerous trials, Jocelyn Riseberg who offered substantial assistance both in the design phase and in the statistical data processing portion of this report, and Joe Paradiso who first introduced me to the sensor which started it all. Additionally, I offer my deepest appreciation towards the many subjects without whose patience and cooperation this would never have been possible.