The Physical Activity Scale for Individuals With Physical Disabilities was examined as a physical activity measure for people with severe mental illness. Case manager ratings were more closely related to body mass index than clients’ ratings, challenging the accuracy of self-report physical activity measures for individuals with severe mental illness.
Source: Bezyak, J., Chan, F., Lee, E.J., & Catalano, D., Chiu, C.Y. (2012). Physical activity level of people with psychiatric disabilities: Consumer vs. case manager ratings. Rehabilitation Counseling Bulletin, 56, 62-64.