Table 3.

 Involving current or former users of a mental health service as interviewers of recipients of the service (clients) in evaluating mental health services

Study	Users involved	Design of study	Measurement of clients' views of service	Significant differences between groups
Clark, 1999, Canada9	Four with severe mental disorder and prior psychiatric hospitalisation	Randomised controlled trial of user interviewers (n=60) and staff interviewers (n=60)	Extremely positive and negative responses and general satisfaction	Clients interviewed by user interviewers gave more extremely negative responses about services
Polowczykl, 1993, USA16	People with schizophrenia or affective disorder in remission	Comparative study of user interviewers (n=225) and staff interviewer (n=305)	Satisfaction score	Clients interviewed by user interviewers gave lower service satisfaction scores