I began to contemplate why Karen’s abilities in music were so very advanced and how this affiliation with music could interfere with her self-injurious gouging behaviors. After seeing many people for whom this was true, I set up an experiment to move beyond observation to investigation. The experiment was an intra-subject design meaning that the same person served as both a subject in the control condition (without music) and the experimental condition (with music). The study began with the psychology team evaluating the frequency and types of self-injurious behaviors for the eight participants. In pilot sessions and then the actual sessions, we played music groups for periods of 20 minutes. Two psychologists rated whether the subjects were self-stimulating or not (binary assess) every thirty seconds.