The present study investigated changes in the self-concept of 49 athletes with intellectual disabilities participating in traditional Special Olympics over a 42-month period. Athletes were interviewed to assess their perceived general self-worth, physical competence and social acceptance, and involvement in Special Olympics, which was operationalized through an overall standard score combining a number of components. After controlling for baseline levels of self-worth and involvement in Special Olympics, changes in involvement in Special Olympics predicted improved general self-worth. After adjustment for baseline levels of perceived physical competence and involvement in Special Olympics, changes in involvement in Special Olympics predicted perceived physical competence at 42 months.Special Olympics Canada, Canadian Institutes of Health Researc
