OBJECTIVE: To estimate the longitudinal bidirectional association between parent-child conflict and child externalizing and internalizing symptoms from the preschool years through adolescence. METHOD: A nationally representative longitudinal study recruited 11,134 children at birth and followed them from December 2010 through June 2022. Primary caregivers completed validated measures at each follow-up, yielding data on parent-child conflict and child symptoms at ages 3, 5, 7, 9, and 13 years. Data were analyzed using a random-intercepts cross-lagged panel model. RESULTS: Assessment was performed in children at ages 3 (n = 9,793), 5 (n = 9,001), 7 (n = 5,344), 9 (n = 8,032), and 13 years (n = 6,655)
50% of participants were girls. Externalizing symptoms at ages 3, 5, and 7 years were prospectively associated with parent-child conflict at ages 5, 7, and 9 years. The opposite associations were not observed, indicating a unidirectional link between child externalizing symptoms and later parent-child conflict during childhood. However, parent-child conflict at age 9 years was prospectively associated with child externalizing symptoms at age 13 years. The opposite prospective association was not observed, indicating a reversal in the direction of the association between externalizing symptoms and parent-child conflict during early adolescence. Prospective associations between parent-reported internalizing symptoms and parent-child conflict were not observed in either direction. CONCLUSION: Findings underscore the importance of both the timing and the targeted nature of interventions for children's mental health. Supporting early self-regulation skills in children could be an effective intervention for preventing parent-child conflict later in development. DIVERSITY & INCLUSION STATEMENT: We worked to ensure sex and gender balance in the recruitment of human participants. We worked to ensure race, ethnic, and/or other types of diversity in the recruitment of human participants. We worked to ensure that the study questionnaires were prepared in an inclusive way. One or more of the authors of this paper self-identifies as a member of one or more historically underrepresented racial and/or ethnic groups in science. One or more of the authors of this paper self-identifies as a member of one or more historically underrepresented sexual and/or gender groups in science. One or more of the authors of this paper received support from a program designed to increase minority representation in science. We actively worked to promote sex and gender balance in our author group. We actively worked to promote inclusion of historically underrepresented racial and/or ethnic groups in science in our author group. While citing references scientifically relevant for this work, we also actively worked to promote sex and gender balance in our reference list. While citing references scientifically relevant for this work, we also actively worked to promote inclusion of historically underrepresented racial and/or ethnic groups in science in our reference list. The author list of this paper includes contributors from the location and/or community where the research was conducted who participated in the data collection, design, analysis, and/or interpretation of the work.