“…There are an increasing number of clinical studies in which PCS's were used to change behavior. The Pain PCS has been evaluated in a considerable number of patients, showing that the PCS treatment has similar outcome as traditional treatment, but also that it achieves this outcome without the efforts and time losses associated with regular visits to the clinic (Kosterink et al, 2010;Sandsjo et al, 2010). The Activity PHS has been evaluated in several chronic patients groups, showing promising results regarding health outcomes, adherence to the motivational cues and changes in activity behavior (Evering, 2013;Tabak et al, 2014aTabak et al, ,b,c, 2013van Weering et al, 2012).…”