Early explications of family communication patterns (FCP) suggested that a family's communication pattern arises as a result of interactions in which parents and adolescents influence each other. In contrast, empirical research usually treats FCP as parent-imposed norms that influence socialization outcomes in adolescents, without testing whether adolescents' socialization influences FCP. This study revisits the assumption that adolescents influence FCP, using data from a longitudinal quasi-experimental evaluation of a school-based civics curriculum intervention (N = 313 parent-adolescent pairs). Results show that the intervention-stimulated adolescents to initiate discussion of politics at home and that these adolescent-initiated discussions influenced adolescents' and parents' perceptions of FCP 6 months later.