TY - JOUR
T1 - Identifying shared environmental contributions to early substance use
T2 - The respective roles of peers and parents
AU - Walden, Brent
AU - McGue, Matt
AU - Iacono, William G.
AU - Burt, S. Alexandra
AU - Elkins, Irene
PY - 2004/8
Y1 - 2004/8
N2 - Although behavior genetic studies have suggested that early substance use is primarily environmentally mediated, no study has sought to identify the specific sources of environmental variance. Using data obtained from multiple informants, this study assessed the contributions of peer deviance and parent-child relationship problems to substance use in 14-year-old male and female twins (N = 1,403) drawn from the Minnesota Twin Family Study (MTFS). All three phenotypes were influenced primarily by shared environmental variance (average c2 = .51), as was the overlap among them. Moreover, peer deviance and parent-child relationship problems accounted for approximately 77% of the variance in early substance use. Findings also indicated that peer deviance, but not parent-child relationship problems, accounted uniquely for variance in early substance use.
AB - Although behavior genetic studies have suggested that early substance use is primarily environmentally mediated, no study has sought to identify the specific sources of environmental variance. Using data obtained from multiple informants, this study assessed the contributions of peer deviance and parent-child relationship problems to substance use in 14-year-old male and female twins (N = 1,403) drawn from the Minnesota Twin Family Study (MTFS). All three phenotypes were influenced primarily by shared environmental variance (average c2 = .51), as was the overlap among them. Moreover, peer deviance and parent-child relationship problems accounted for approximately 77% of the variance in early substance use. Findings also indicated that peer deviance, but not parent-child relationship problems, accounted uniquely for variance in early substance use.
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U2 - 10.1037/0021-843X.113.3.440
DO - 10.1037/0021-843X.113.3.440
M3 - Article
C2 - 15311989
AN - SCOPUS:3843088346
SN - 0021-843X
VL - 113
SP - 440
EP - 450
JO - Journal of abnormal psychology
JF - Journal of abnormal psychology
IS - 3
ER -