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Emotional and behavioral problems among female twins: an evaluation of the equal environments assumption.
J Am Acad Child Adolesc Psychiatry. 2002 Jul; 41(7):829-37.JA

Abstract

OBJECTIVE

To evaluate the equal environments assumption (EEA) of the twin method for mother-reported symptoms of child and adolescent emotional and behavioral problems.

METHOD

Four emotional and behavioral problem scales (symptoms of separation anxiety disorder, attention-deficit/hyperactivity disorder, oppositional defiant disorder, and conduct disorder) and four environmental similarity measures (sharing friends, sharing classes, dressing alike, and perceived zygosity) were assessed by telephone interviews with the biological mothers of 1,948 female adolescent and young adult twin pairs. The effect of environmental similarity on the magnitude of the monozygotic and dizygotic twin correlations and on the parameter estimates from genetic model-fitting was examined for each symptom scale.

RESULTS

The measures of environmental similarity were not strongly or consistently related to the similarity of twins for mother-reported emotional and behavioral problems. On average, controlling for environmental similarity did not substantially affect estimates of genetic and environmental influences.

CONCLUSIONS

These results lend support for the validity of the EEA and suggest that estimates of genetic and environmental influences obtained from twin studies of mother-reported child and adolescent emotional and behavioral problems are not unduly biased by the greater environmental similarity of monozygotic than dizygotic twins.

Authors+Show Affiliations

Missouri Alcoholism Research Center, Department of Psychological Sciences, University of Missouri-Columbia, 65211, USA. nikole@taxa.psyc.missouri.eduNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article
Research Support, U.S. Gov't, P.H.S.
Twin Study

Language

eng

PubMed ID

12108808

Citation

Cronk, Nikole J., et al. "Emotional and Behavioral Problems Among Female Twins: an Evaluation of the Equal Environments Assumption." Journal of the American Academy of Child and Adolescent Psychiatry, vol. 41, no. 7, 2002, pp. 829-37.
Cronk NJ, Slutske WS, Madden PA, et al. Emotional and behavioral problems among female twins: an evaluation of the equal environments assumption. J Am Acad Child Adolesc Psychiatry. 2002;41(7):829-37.
Cronk, N. J., Slutske, W. S., Madden, P. A., Bucholz, K. K., Reich, W., & Heath, A. C. (2002). Emotional and behavioral problems among female twins: an evaluation of the equal environments assumption. Journal of the American Academy of Child and Adolescent Psychiatry, 41(7), 829-37.
Cronk NJ, et al. Emotional and Behavioral Problems Among Female Twins: an Evaluation of the Equal Environments Assumption. J Am Acad Child Adolesc Psychiatry. 2002;41(7):829-37. PubMed PMID: 12108808.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Emotional and behavioral problems among female twins: an evaluation of the equal environments assumption. AU - Cronk,Nikole J, AU - Slutske,Wendy S, AU - Madden,Pamela A F, AU - Bucholz,Kathleen K, AU - Reich,Wendy, AU - Heath,Andrew C, PY - 2002/7/11/pubmed PY - 2002/8/20/medline PY - 2002/7/11/entrez SP - 829 EP - 37 JF - Journal of the American Academy of Child and Adolescent Psychiatry JO - J Am Acad Child Adolesc Psychiatry VL - 41 IS - 7 N2 - OBJECTIVE: To evaluate the equal environments assumption (EEA) of the twin method for mother-reported symptoms of child and adolescent emotional and behavioral problems. METHOD: Four emotional and behavioral problem scales (symptoms of separation anxiety disorder, attention-deficit/hyperactivity disorder, oppositional defiant disorder, and conduct disorder) and four environmental similarity measures (sharing friends, sharing classes, dressing alike, and perceived zygosity) were assessed by telephone interviews with the biological mothers of 1,948 female adolescent and young adult twin pairs. The effect of environmental similarity on the magnitude of the monozygotic and dizygotic twin correlations and on the parameter estimates from genetic model-fitting was examined for each symptom scale. RESULTS: The measures of environmental similarity were not strongly or consistently related to the similarity of twins for mother-reported emotional and behavioral problems. On average, controlling for environmental similarity did not substantially affect estimates of genetic and environmental influences. CONCLUSIONS: These results lend support for the validity of the EEA and suggest that estimates of genetic and environmental influences obtained from twin studies of mother-reported child and adolescent emotional and behavioral problems are not unduly biased by the greater environmental similarity of monozygotic than dizygotic twins. SN - 0890-8567 UR - https://www.unboundmedicine.com/medline/citation/12108808/Emotional_and_behavioral_problems_among_female_twins:_an_evaluation_of_the_equal_environments_assumption_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0890-8567(09)61051-0 DB - PRIME DP - Unbound Medicine ER -