Children of incarcerated parents have been found to be twice as likely as their peers to exhibit antisocial behavior problems, such as aggression, noncompliance, and stealing. The report presents findings from the Parent Child Study that compared outcomes for incarcerated fathers and mothers assigned to Parent Management Training (PMT) versus a “services as usual” control condition. The PMT intervention, called Parenting Inside Out, was designed for delivery to incarcerated parents to provide them with motivation, knowledge and skills relevant to their role in the prevention of the development of antisocial behavior and associated problem behaviors in their children.