We conducted a dismantling design treatment study comparing individual CBT, CBT targeting parents' reinforcement skills (CBT+Reinf), and CBT targeting parents' relationship skills (CBT+ Relat) in 341 youths with primary anxiety diagnoses. At posttreatment, youths in CBTs with parent involvement had lower anxiety than youths in CBT. At 12-month follow-up, youths in CBT+Relat maintained lower anxiety relative to CBT. At posttreatment, negative reinforcement was significantly lower in CBT+Reinf than CBT+Relat and CBT; negative reinforcement partially mediated youth anxiety reduction. Reducing parental negative reinforcement in CBT+Reinf was associated with lower parental psychological control which also partially mediated youth anxiety reduction. Some of these mediational dynamics continued through follow-up. Targeting concrete behavioral parenting skills, especially negative reinforcement, produced treatment specificity and partial mediation relative to less concrete targeting, and enhanced CBT. Findings highlight complexities in identifying mechanisms through which targeting of parenting skills produces youth anxiety reduction and suggest avenues for future research.
Keywords: anxiety disorders; clinical child intervention; clinical trials; cognitive therapy/CBT; evidence-based treatments.