“…In terms of research, the PIT is one of the small numbers of non‐cognitive behavioural therapies for which there is an evidence base drawing on trials methodology. The model has been the subject of a programme of research which has demonstrated the following: (1) efficacy for people who self‐harm (Guthrie et al , 2001); (2) reduction in healthcare costs for people with chronic non‐psychotic psychiatric problems (Guthrie, Moorey, Barker, Margison, & McGrath, 1998; Guthrie et al , 1999); (3) palliative effect for people with irritable bowel syndrome and chronic dyspepsia (Guthrie, Creed, Dawson, & Tomenson, 1991; Hamilton et al , 2000); and (4) broadly equivalent outcomes with cognitive behavioural therapy for people presenting with depression (Shapiro et al , 1994).…”