Psychiatric rehabilitation is based on the assumption that adequate social and
role functioning is the outcome of three factors; the characteristics of the individual, the community’s requirements for adequate functioning, and the supportiveness of the
environment. The individual’s characteristics –symptoms, cognitive functioning, past
experiences, current role skills– limit his/her functioning; the community’s requirements
are the standards for evaluating that functioning; and the environment may be either
responsive or indifferent to the individual’s attempts to function