The Colorado Adoption Project (CAP) is a longitudinal adoption study, examining development continuously from birth to adolescence. In so doing, it hopes to offer an insight into the cognitive, social, emotional, and physical development which arise in the debate over nature versus nurture.

1. Nature, Nurture and Adolescent Development: An Introduction ; 2. Developmental Analysis of IQ ; 3. Multivariate Parent-Offspring Analyses of Specific Cognitive Abilities ; 4. Etiology of the Stability of Reading Performance from 7 to 12 Years of Age and Its Possible Mediation by IQ ; 5. Memory Ability During Middle Childhood and Early Adolescence in the Colorado Adoption Project ; 6. Somatic Complaints from Early Childhood to Early Adolescence ; 7. Teacher and Mother Ratings of Attention Problems ; 8. Adopted and Nonadopted Adolescents' Adjustment ; 9. Stability and Change in Internalizing Problems in the Transition to Early Adolescence: Genetic and Environmental Influences ; 10. Loneliness During the Transition to Early Adolescence ; 11. Genetic Influences on Temperament in Early Adolescence: A Multimethod Perspective ; 12. Links between Temperament and Behaviour Problems in Early Adolescence ; 13. Using the Social Relations Model to Examine Correlates of Adolescent Humour: The Role of Temperament and Well-Being ; 14. Effects of Prenatal Smoking on 12-year-old Children's Cognitive and Behavioural Problems and Negative Family Environments ; 15. A Genetic Analysis of Extremes in Externalizing Behavioural Problems and Negative Family Environments ; 16. Maternal Reports of Differential Treatment During Early Adolescence: A Longitudinal Study of Genetic Influences and Links to Child Well-Being ; 17. Genetic Influences on Life Events in Middle Childhood and Early Adolescence ; 18. The Developmental Trajectory of Genotype-Environment Correlation in Early Adolescence ; 19. Conclusions