title: Twins as a basis for the causal analysis of human personality.
mesh_terms: D000293:Adolescent; D000300:Adoption; D000328:Adult; D000367:Age Factors; D000368:Aged; D005120:Extraversion, Psychological; D005190:Family; D005260:Female; D014644:Genetic Variation; D005823:Genetics; D005828:Genetics, Population; D005838:Genotype; D006801:Humans; D007175:Impulsive Behavior; D008137:Longitudinal Studies; D008875:Middle Aged; D009497:Neurotic Disorders / Q000175:diagnosis; D010551:Personality; D011247:Pregnancy; D012107:Research Design; D012737:Sex Factors; D012931:Social Environment; D014427:Twins