The purpose of the CAP is to study both nature and nurture, to determine the genetic predispositions as well as the environmental influences that contribute to traits such as intelligence, personality, and behavior. In order to do this a wide range of interviews are conducted with participating families. These include in-person and telephone interviews that measure cognition, social attitudes, and behavioral choices.


  • John DeFries

  • John Hewitt

  • Robert Plomin

  • Michael Stallings

  • Robin Corley

  • Chandra Reynolds

  • Sally Wadsworth

Publication Highlights:

1. Nilsson, R., Rhee, S.H., Corley, R.P., Rhea, S.A., Wadsworth S.J.,  & John C. DeFries J.C., (2011) Conduct Problems in Adopted and Non-Adopted Adolescents and Adoption Satisfaction as a Protective Factor. Adoption Quarterly, 14, 181-198. Pubmed Article

2. Stallings, M.C., Corley, R.P., Dennehey, B., Hewitt, J.K., Krauter, K.S., Lessem, J.M., Mikulich-Gilbertson, S.K., Rhee, S.H., Smolen, A., Young, S.E., & Crowley, T.J. (2005). A genome-wide search for quantitative trait loci influencing antisocial drug dependence in adolescence. Archives of General Psychiatry, 62, 1042-1051. Pubmed abstract

3. Wadsworth, S.J., Corley, R.P., Plomin, R., Hewitt, J.K. & DeFries, J.C. (2006). Genetic and environmental influences on continuity and change in reading achievement in the Colorado Adoption Project. In A. Huston & M. Ripke (Eds.) Middle Childhood: Contexts of Development, pp 87 - 106.

4. Button, T.M.M., Rhee, S.H., Hewitt, J.K., Young, S.E., Corley, R.P., Stallings, M.C. (2007) The role of conduct disorder in explaining the comorbidity between alcohol and illicit drug dependence in adolescence. Drug and Alcohol Dependence8746-53.PUBMED abstract

Contact Information:

Annie Johnson
phone: 303-492-8985
fax: 303-492-8063

CAP Website