Preparing for parenthood: Validating a mixed method approach to assessing the coparenting capacity of young expectant fathers and mothers.

The transition to parenthood (TP) interview and coparenting capacity (CC) coding scheme is a mixed method approach to evaluating readiness for the interpersonal challenges of parenthood. This paper focuses on the validation of the TP-CC system with a diverse sample of 140 young expectant father/mother pairs. The TP interview is designed to assist expectant parents in expressing their thoughts and feelings about parenthood and coparenting and the CC coding scheme is designed to assess a new parent's capacity for expressing fondness, acceptance, growth, cohesion, and commitment in their relationship with their coparenting partner. Convergent validation of the TP-CC system involved measuring self- and partner-reported relationship quality, relationship security, and observed warmth and hostility during the pregnancy. Predictive validation focused on the same set of variables, measured at the 6-month postbirth follow-up. Results supported the convergent validity of the TP-CC system for mothers and fathers, with higher-specific CC scores correlating with higher relationship quality, relationship security and warmth scores, as well as lower hostility scores. Results partially supported predictive validity, with fathers' total CC scores predicting fathers' interpersonal hostility and mothers' relationship quality, relationship security, hostility, and warmth at follow-up. Consistently positive and significant correlations between both mothers and fathers prebirth and postbirth CC scores provide evidence for the test-retest reliability of the TP-CC system. Generally, findings demonstrate the potential utility of the TP-CC system for evaluating coparenting readiness across the transition to parenthood.