Johnson, W., McGue, M. & Iacono, W.G. (in press) How Parents Influence School Grades: Hints from a Sample of Adoptive and Biological Families. Learning and Individual Differences, in press.

Johnson, W., McGue, M. & Iacono, W.G. (in press) Socialeconomic Status and School Grades: Placing their Association in Broader Context in a Sample of Biological and Adoptive Families. Intelligence, in press.

Johnson, W., McGue, M. & Iacono, W.G. (2006) Genetic and Environmental Influences on Academic Achievement Trajectories during Adolescence. Developmental Psychology, 42, 514-532.

Johnson, W., McGue, M. & Iacono, W.G. (2005) Disruptive Behavior and School Grades: Genetic and Environmental Relations in 11-Year-Olds. Journal of Educational Psychology, 97, 391-405.