We did this 10 years ago at Wisconsin, during my PhD: http://www.inference.eng.cam.ac.uk/saw27/dasher/bci/ http://www.inference.eng.cam.ac.uk/saw27/dasher/bci/

We did this 10 years ago at Wisconsin, during my PhD: http://www.inference.eng.cam.ac.uk/saw27/dasher/bci/ http://www.inference.eng.cam.ac.uk/saw27/dasher/bci/ The video I made of one of our undergrad assistants is still up there!