Discipline Patterns and Child Externalizing Problems in Low-Income Unmarried Families

Abstract Purpose With rising nonmarital births and the adverse effects of poverty on families, understanding discipline patterns among low-income, unmarried parents is essential. Prior studies have often focused on individual parents, typically mothers, leaving dyadic parenting dynamics underexplored. This study aimed to identify distinct patterns of parental discipline within dyadic family systems in low-income, unmarried families and examine parental, interparental, and child factors predicting group membership and associated child outcomes. Method Data were drawn from the Building Strong Families study, a longitudinal study of low-income couples. Analyses included 1,466 couples living together at the 36-month follow-up. Latent class analysis with a three-step procedure identified discipline patterns, examined parental, interparental, and child predictors, and compared child externalizing behavior across groups. Results Four discipline patterns emerged: (1) Mother harsh discipline (22.31%), with mothers’ frequent harsh and positive discipline; (2) Father harsh discipline (26.12%), with fathers’ frequent harsh discipline; (3) Both harsh discipline (19.65%), with both parents using harsh strategies; and (4) Both positive discipline (31.92%), with both parents consistently using positive, non-violent approaches. Maternal education, employment, intimate partner violence (IPV), fathers’ coparenting support, and paternal parenting stress predicted group membership. Children in the both harsh and maternal harsh groups exhibited the highest externalizing behavior, whereas those in the both positive group had the lowest. Conclusions Discipline patterns varied by severity and alignment between parents. Maternal harsh discipline posed a significant risk, while consistent positive parenting was protective. Findings emphasize dyadic, family-centered interventions, IPV prevention, and early screening to support vulnerable families.