title: Observations on research in adolescence.
mesh_terms: D000124:Achievement; D000293:Adolescent; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D001523:Mental Disorders / Q000175:diagnosis; D009229:Mythology; D011574:Psychoanalytic Theory; D000297:Psychology, Adolescent; D012106:Research; D012107:Research Design; D012737:Sex Factors; D012923:Social Class