“…Behavioral Parent Training (BPT) is the standard of care for early onset DBDs; indeed, robust evidence shows significant post-treatment improvement in disruptive behaviors, which is hypothesized to occur via improvements in the parent-child relationship (e.g., Chorpita et al, 2011; Eyberg, Nelson, & Boggs, 2008; McMahon, Wells, & Kotler, 2006). Yet, preliminary data suggests BPT for DBDs may also yield changes in comorbid internalizing problems and caregiver depression (e.g., Carpenter, Pulifico, Kurtz, Pincus, & Comer, 2014; Timmer et al, 2011; Webster-Stratton & Herman, 2008). Greater understanding of how and why BPT has such cascading effects is consistent with calls for testing manual-based treatments with comorbid children (Jensen Doss, 2005) and cost-effective first-line treatments targeting clusters of symptoms within and across family systems (NIMH, 2015).…”