Objectives:The main purpose of this study was to explore longitudinal transactional and mediational relationships between mothers' happiness, parenting behaviors, and children's happiness during the transition from kindergarten to elementary school. Methods: This study used data from the 7th (T1) through 9th (T3) wave (2014)(2015)(2016) of the Panel Study on Korean Children (PSKC). Participants of this study were 1,302 mothers and their children, aged 6 to 8 years old. Data analysis was performed using autoregressive cross-lagged modeling. Results: First, the longitudinal transactional relationship was confirmed among mothers' happiness, maternal warmth, and children's happiness. Second, the longitudinal relationship between children's happiness at T1 and mothers' happiness at T3 was mediated by maternal warmth at T2. Finally, the longitudinal relationship between maternal warmth at T1 and mothers' happiness at T3 was mediated by children's happiness at T2.
Conclusion:This study revealed longitudinal effects of transactional and mediational relationships on children, as well as on parents, in the transition period from kindergarten to elementary school. This finding highlighted the need for interventions to promote happiness of children at a familial level.