Parental treatment and the equal environment assumption in twin studies of psychiatric illness.

doi:10.1017/s0033291700027732

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Article

Parental treatment and the equal environment assumption in twin studies of psychiatric illness.

Psychological medicine - 1 Aug 1994

Kendler K S, Neale M C, Kessler R C, Heath A C, Eaves L J

Abstract excerpt

The validity of the twin method depends on the equal environment assumption (EEA)--that monozygotic (MZ) and dizygotic (DZ) twins are equally correlated in their exposure to environmental factors of aetiological importance for the trait under study. Parents may treat MZ twins more similarly than DZ twins thereby potentially violating the EEA. We tested this hypothesis for four common psychiatric disorders (major...

Topics

Adult
Aged
Alcoholism
Anxiety Disorders
Bias
Child
Child Rearing
Depressive Disorder
Diseases in Twins
Female
Humans
Male

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Middle Aged

Parenting

Phenotype

Phobic Disorders

Risk Factors

Social Environment

Source

Open in PubMed

Identifiers

PMID: 7991740
DOI: 10.1017/s0033291700027732

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 29 Aug 2026. Prepared record publication-7991740-2026-08-29.1. Manifest publication-graph-cohort-2026-08-29.1.

Source receipt: PubMed via Helena Literature Corpus, retrieved 29 Aug 2026.

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