title: A cognitive developmental model of rigidity in senescence.
mesh_terms: D000339:Affect; D000368:Aged; D000375:Aging; D003071:Cognition; D003210:Concept Formation; D006803:Human Development; D006801:Humans; D007360:Intelligence; D010465:Perception; D010551:Personality; D011340:Problem Solving; D011582:Psychological Theory; D013850:Thinking