title: Social breakdown and competence. A model of normal aging.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D006801:Humans; D008875:Middle Aged; D008960:Models, Psychological; D011593:Psychology, Social; D012649:Self Concept; D012917:Social Adjustment; D012919:Social Behavior; D012931:Social Environment; D012951:Socialization