Abstract
Extending a recent parent mediation efficacy trial, we identified parent reinforcement and relationship behaviors as setting boundary conditions, or moderators, of youth anxiety outcome in 254 youths and their parents, who were randomized to: (1) Cognitive Behavioral Treatment (CBT) with parent reinforcement behavior training (CBT + Reinf); (2) CBT with parent relationship behavior training (CBT + Relat); or (3) individual youth CBT - a comparator control arm. Findings revealed that parents with high baseline negative reinforcement levels and acceptance levels (i.e., above the mean) report their children as having lower anxiety at outcome, when assigned to CBT + Reinf, and CBT + Relat, respectively, versus CBT. No moderation effects were found for either parent positive reinforcement or parent psychological control. Implications for treating anxiety disorders and moving toward precision treatment approaches in youth are discussed, and the importance of research replication and extension.