“…There is therefore a clear need for further research to facilitate this development. And, whilst outcome studies assessing and comparing the efficacy of the various treatment approaches continue to be vital, there is also, we would argue, a particular need for additional research which engages with a broader range of methodologies and theoretical perspectives to address a wider variety of aspects of treatment including, for example, investigation of patients' and health care workers' experiences of treatment (see Burns, 2004;Eivors et al, 2003;Gremillion, 2003;Malson, Finn, Treasure, Clarke, & Anderson, 2004;Ramjan, 2004) and of non-specific factors in treatment (see Le Grange & Gelman, 1998;McIntosh, Jordan, Luty, McKenzie, & Joyce, 2004) which may not be revealed in quantitative research.…”