title: Cognitive functioning in middle and old age adults: a review of research based on Piaget's theory.
mesh_terms: D000368:Aged; D000375:Aging; D003071:Cognition; D005260:Female; D006801:Humans; D008128:Logic; D008297:Male; D008875:Middle Aged; D008960:Models, Psychological; D009014:Morals; D012107:Research Design; D013647:Task Performance and Analysis