title: Psychoanalysis--science and research: twin studies as a paradigm.
mesh_terms: D001724:Birth Weight; D002657:Child Development; D003858:Dependency, Psychological; D004200:Diseases in Twins; D004532:Ego; D005190:Family; D005260:Female; D006801:Humans; D007062:Identification, Psychological; D007207:Individuation; D008297:Male; D001523:Mental Disorders / Q000235:genetics; D009769:Object Attachment; D011247:Pregnancy; D011574:Psychoanalytic Theory; D011575:Psychoanalytic Therapy; D012106:Research; D012559:Schizophrenia / Q000235:genetics; D012586:Science; D012931:Social Environment; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic