Abstract: A behavioral rehearsal system in which full body tracking, facial tracking and voice modulation technology are used with virtual reality hardware and software to allow a therapist, or “leader,” to interact directly with a patient, or “subject,” in a virtual reality setting that is designed to simulate the actual environments and individuals the subject has experienced difficulty with. One or more avatars are controlled by the leader in these environments to simulate the form, dress, speech and mannerisms of a person or persons appropriate to the setting and circumstances identified in the subject's presenting symptoms. Therapists or leaders are able to interact with their subjects in a way that was previously impossible, through real-time social interaction that is specific to the subject's needs.