Mental health care increasingly faces a challenge to be 'evidence based'. However, it's still not clear what sort of evidence researchers should be producing for mental health services, or what purchasers should be looking for. "Evidence in Mental Health Care" evaluates a range of different research methodologies and will prove vital for the successful extension of evidence-based evaluation to mental health services in general. It will be essential reading for researchers, students and practitioners across the range of mental health disciplines, health service managers and purchasers of services.