- Participants must currently be in treatment at the Prevention and Early Intervention Program for Psychosis (PEPP) for psychosis. In addition, participants must have been involved in the program for a period of less than 3 years, due to the focus of this study being on the treatment of early psychosis. Participants must be between the ages of 18 and 30 years old. Participants must be fluent in English, as determined by referring clinicians or researchers (in the case of advertisement referred participants) in order to meaningfully participate in the MAC intervention and complete the assessment tools.