Presidential address, 1981. Research with twins: the concept of emergenesis.
D000328:Adult; D001143:Arousal; D005260:Female; D014644:Genetic Variation; D006801:Humans; D007207:Individuation; D007360:Intelligence; D008297:Male; D008875:Middle Aged; D010553:Personality Development; D011247:Pregnancy; D012931:Social Environment; D014427:Twins; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic