In March 2008, BrainRobot research group of the IAT of the University of Bremen went to the CeBit in Hannover. We conducted a study of SSVEP-based BCI application there. We were doing experiments whether people can spell words using their brain wave: EEG. We got 106 subjects.
Below is the video about what happened in CeBit.
The result of the experiments can be seen in Allison, et al, 2008, "BCI Demographics: How many (and what kinds of) people can use an SSVEP BCI?", Proc 4th International Brain-computer Interface Workshop and Training Course, Graz, Austria, pp 333-338.