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Readable research linked to original sources
Browse normalized, publication-ready research with direct links to its evidence and source.
Loading articles data…
Readable research linked to original sources
Browse normalized, publication-ready research with direct links to its evidence and source.
1 articles
Newest firstAimsTo examine the genetic and environmental contributions to the initiation of use and progression to more serious use of alcohol, cigarettes and marijuana during adolescence, and to examine the relationship between initiation and progression of substance use.DesignThe study used a twin-based design and a new theoretical model, the causal–common–contingent (CCC) model. This allows modelling of the relationship be…
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