We examined reciprocal relations between parental marital conflict and children's sleep disruptions over two years. The roles of ethnicity (African American and European American) and socioeconomic status were tested as moderators of the examined relations. A community sample of 176 school-age children (M age = 8.68 at T1) and their parents participated at T1 and T2 with a 2-year interval between waves. Mothers, fathers, and children reported on parental marital conflict, and children's sleep was measured via actigraphy and self-reports. Latent variable modeling indicated that T1 marital conflict predicted increases in children's sleep disruptions longitudinally; results were more pronounced for African American children and those from lower SES homes. Further, children's sleep disruptions at T1 predicted increases in marital conflict over time. Results demonstrate the importance of reciprocal relations between a prevalent familial stressor and a fundamental facet of children's health, especially when considering the sociocultural milieu.
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