“…For traditional IPS services the fidelity scale is a powerful guide to designing and delivering high quality IPS services and performance. Given the activity, trialling and effectiveness of IPS services over the past twenty years, and given the central place of IPS fidelity to the IPS model, the IPS fidelity scale has understandably been the subject of significant attention within the academic literature in a range of ways including: the creation and evolution of the IPS-25 fidelity scale (Bond et al, 1997;Bond et al, 2002;McGrew and Griss, 2005;Bond et al, 2012b); the link between employment outcomes with the total fidelity score (Bond et al, 2012b;Kim et al, 2015;Lockett et al, 2016) and, as important but less commonly, individual fidelity items (Bond et al, 2012b;Kim et al, 2015;Margolies et al, 2018); sub-dimensions of the fidelity scale (Bond et al, 2002); differing levels or types of fidelity scale (Mowbray et al, 2003;Bond et al, 2011); fidelity assessment and self-assessment (Bond et al, 2011;Margolies et al, 2017); and the moderating role of individual and contextual factors between IPS fidelity and employment outcomes (Campbell et al, 2010;Metcalfe et al, 2018).…”