The Strengthening Families Program for Youth 10-14 (SFP10-14), an evidence-based intervention that reduces teen substance use, also reduced participants’ friends’ substance use. Two factors that accounted for the nonparticipants’ reductions were less time spent by nonparticipants with their participating friends without adult supervision and improvements in nonparticipants’ attitudes toward substance use. The findings suggest that researchers should consider the potential for diffusion of benefits in designing and implementing prevention programs.
August 2014 Clinicians associated with the Veterans Administration looked more favorably upon contingency management after attending training workshops on the use of the intervention. Despite being highly effective at decreasing drug use, contingency management is one of the least used among proven substance abuse treatments.