- Participants must currently be in treatment for psychosis at one of the five Early Psychosis Intervention (EPI) study sites. 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 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.