Partner predictors of marital aggression across the transition to parenthood: an I3 approach

© The Author(s) 2018. The stress that arises during the transition to parenthood often places significant strain on marriages that can result in marital problems such as aggression victimization. In this research, we use an I 3 framework to identify specific partner variables that are likely to promote physical aggression victimization across the transition to parenthood. Examining both intercepts (i.e., mean levels of aggression victimization estimated at childbirth) and slopes (e.g., changes in aggression victimization estimated over time), we find support for a three-way interaction anticipated by the I 3 framework. Specifically, male partners were more likely to report being the victim of aggression at childbirth and also during the 24 months that followed when their female partner reported experiencing greater parental stress (an instigator to aggression in the I 3 framework), greater relationship-specific attachment avoidance (an impellor to aggression), and lower relationship satisfaction (the lack of an inhibitor to aggression). Implications for the prevention of marital aggression associated with these I 3 factors are discussed.