“…One of the factors that may contribute to the variation in reported estimates is the criteria researchers use to decide whether a service user has been "offered" an intervention or not. Other possible reasons for varied reported implementation rates may include differences in the way data are collected, with some studies using objective measures (Haddock et al, 2014;Lewis, Buffham, & Evenson, 2012;Pawel et al, 2012) and others using subjective measures (Gough et al, 2007;Macpherson, Hovey, Ranganath, Uppal, & Thompson, 2008), studies not providing information regarding the data collection process (H. Commission, 2007;Kuipers, 2011;Prytys, Garety, Jolley, Onwumere, & Craig, 2011), and uncertainty regarding the criteria used to ascertain diagnosis. This highlights a common problem in many of the published papers reporting implementation figures: There is a lack of distinction between reports of services having been "offered," "delivered," or "received."…”