The relationship between age and engagement in pleasant activities.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D003863:Depression; D004522:Educational Status; D004651:Employment; D005191:Family Characteristics; D005260:Female; D006801:Humans; D007406:Interview, Psychological; D008950:MMPI; D008297:Male; D008875:Middle Aged; D009922:Oregon; D010551:Personality; D011581:Psychological Tests; D011998:Recreation; D012737:Sex Factors