... economics and management. How Do You Know When and Which Theory to Use? Depending on the unit of analysis or target of change (e.g., individuals, groups, organ-izations or communities) and the ... administration, and health policy—work effectively with and on behalf of individuals who present with co-occurring health and mental health conditions, their families, and community and Mental ... change theory would be social (cognitive) learning theory (Bandura, 1977), in which change is activated by the interaction of social, cognitive, and environmental action interventions.■ Change...