Decreasing effect sizes for effectiveness studies- implications for the transport of evidence-based treatments: comment on curtis, ronan, and borduin (2004).

The most important finding from the N. M. Curtis, K. R. Ronan, and C. M. Borduin (2004) meta-analysis for the broader field is likely the difference in effect sizes between multisys- multisystemic therapy efficacy versus effectiveness studies. This difference has important implications for research on the transport of evidence-based treatments to community practice settings. For example, factors rarely considered in efficacy research (e.g., funding structures, organizational climate, program maturity, site characteristics) are emerging as important determinants of treatment fidelity and, in turn, clinical outcomes for practice in real-world settings. Current research is clearly demonstrating that evidence-based practices can be successfully transported, but much remains to be learned regarding the optimal parameters of such transport. Copyright 2004 American Psychological Association