a predilection toward externalizing disorders may be particularly helpful. Specifically, when intervention in the parent is possible, it has been observed that interventions aimed at strengthening parent-child relations may be less effective than those aimed at reducing parent substance use (Burstein et al. 2006), and reducing parent substance use may be more important for interfering with the generational transmission of externalizing behavior than is any particular parenting practice (Bailey et al. 2009).
