Older age is a transitional period when people experience changes not only in physical health, but also in social roles (for example, retirement, children are grown) that can influence opportunities for social participation. Epidemiological studies suggest that social activities may be particularly important for older adults. The possible health benefits include reduced risk of mortality, disability and depression, and better cognitive health, self-rated health and health-related behaviours. Thus, social participation has been integrated into research and policy frameworks of aging. For instance, social engagement—involvement in meaningful activities and maintaining close relationships—is a component of successful aging.