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Article

Why do identical twins differ in personality: shared environment reconsidered.

Twin research : the official journal of the International Society for Twin Studies - 1 Feb 2002

Torgersen Anne Mari, Janson Harald

Abstract excerpt

While heritability studies show that most of the variance in adult personality can be attributed to genetic or so-called nonshared environmental influence, this does not mean that shared events lack importance for the development of later personality differences. We studied the relationship between Big Five personality differences in monozygotic (MZ) twins at age 29, and life stressors at age 6 to 15, using...

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PMID: 11893281
DOI: 10.1375/1369052022893

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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