“…Although family interventions are effective in preventing drug use initiation, more recently a major amount of interest has been given to focus on specific questions that are relevant to the issue of effectiveness. As so, recent research (Collins, Ready, Griffin, Walker & Mascaro, 2007;Shapiro, Prinz & Sanders, 2008;Letarte et al, 2010;Ocak, 2011;Hutzler, 2011;Ferrer-Wreder, Adamson, & Kumpfer, 2012) has examined how effective programs can bring improvements to the target groups in the real life. As stated by Skärstrand, Bränström, Sundell, Källmén, & Andréasson (2009), "There is a difference in efficacy studies and effectiveness studies.…”