“…Linman et al, 2008;McCarthy et al, 2011;McGillivray, 2002;Rongen et al, 2014) and several studies have sought to examine the common barriers to participation (Bright et al, 2012;Lakerveld et al, 2008;Linnan, Sorensen, Colditz, Klar, & Emmons, 2001;Person, Colby, Bulova, & Eubanks, 2010;Robroek, van Lenthe, van Empelen, & Burdorf, 2009). Indeed, the participation issue has become so significant in the United States that the use of incentives is now commonplace, with estimates suggesting that incentive increases of $100 can improve participation rates by 10% (Goetzel & Ozminkowski, 2008). As a result, incentives are considered to be a key to successful program implementation (Rula & Sacks, 2009) and lack of formal incentives has been confirmed to be a major barrier to participation (Person et al, 2010).…”