“…These data clearly show that adverse parenting behaviors, particularly frequent corporal punishment, are important contributors to the growth of peer aggression in young children. High levels of aggressive behavior in kindergarten have been linked with chronic, cascading social and academic difficulties that include peer victimization (e.g., Morrow, Hubbard, McAuliffe, Rubin, & Dearing, 2006), use of illicit substances (Dodge et al, 2009), and poor educational attainment in early adulthood (Vitaro, Brendgen, Larose, & Tremblay, 2005). Thus, our data highlight the need for family intervention during the early preschool years.…”