Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20287
Title: Does the Environment Have an Enduring Effect on ADHD?: A Longitudinal Study of Monozygotic Twin Differences in Children
Contributor(s): Livingstone, Luisa T (author); Coventry, William L  (author)orcid ; Corley, Robin P (author); Willcutt, Erik G (author); Samuelsson, Stefan (author); Olson, Richard K (author); Byrne, Brian J  (author)orcid 
Publication Date: 2016
DOI: 10.1007/s10802-016-0145-9
Handle Link: https://hdl.handle.net/1959.11/20287
Abstract: Environmental factors play a key role in the development of Attention-Deficit/Hyperactivity Disorder (ADHD), but the long-term effects of these factors are still unclear. This study analyses data from 1024 monozygotic (identical) twins in Australia, the United States, and Scandinavia who were assessed for ADHD in Preschool, Kindergarten, Grade 1, and Grade 2. Differences within each twin pair were used as a direct measure of non-shared environmental effects. The Trait-State-Occasion (TSO) model developed by Cole et al. (Psychological Methods, 10, 3-20, 2005) was used to separate the non-shared environmental effects into stable factors, and transient factors that excluded measurement error. Stable factors explained, on average, 44 % and 39 % of the environmental variance in hyperactive-impulsive and inattentive symptoms, respectively. Transient effects explained the remaining 56 % and 60 % of variance. The proportion of stable variance was higher than expected based on previous research, suggesting promise for targeted interventions if future research identifies these stable risk factors.
Publication Type: Journal Article
Source of Publication: Journal of Abnormal Child Psychology, 44(8), p. 1487-1501
Publisher: Springer New York LLC
Place of Publication: United States of America
ISSN: 0091-0627
1573-2835
Field of Research (FOR): 060412 Quantitative Genetics (incl. Disease and Trait Mapping Genetics)
170102 Developmental Psychology and Ageing
Socio-Economic Outcome Codes: 920401 Behaviour and Health
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
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