title: [The question of cognitive activity in twins].
authors.affiliation: Laboratoire de Psychologie Génétique Cognitive de Terrain, University of Lyon II.
authors.forename: F
authors.initials: F
authors.lastname: Bak
mesh_terms: D002648:Child; D002657:Child Development; D002675:Child, Preschool; D003071:Cognition / Q000502:physiology*; D003072:Cognition Disorders / Q000209:etiology; D006801:Humans; D007207:Individuation; D007223:Infant; D008960:Models, Psychological; D011581:Psychological Tests; D012801:Sibling Relations; D014427:Twins / Q000523:psychology*; D014429:Twins, Dizygotic / Q000523:psychology; D014430:Twins, Monozygotic / Q000523:psychology