A control question method for evaluating whether or not a subject has previously performed a given act. The subject is preliminarily questioned about the given and other unrelated acts, and then is serially repetitively presented with an odd-ball paradigm comprised of such given facts as well as irrelevant facts. Event-related potentials concurrently generated by the subject are electroencephalographically sensed and analyzed for P3 content and the P3 waves generated by each paradigm repeat are compared. Based on selected criteria, a conclusion regarding prior act performance is made. Computer means are utilized to regulate the paradigm presentation and to interpret and analyze the P3 responses.
Method for the analysis and utilization of P300 brain waves