David Harper is Reader in Clinical Psychology at the University of East London. He is co-author of Deconstructing Psychopathology (1995) and Psychology & Mental Health:  From Disorder to Experience (2011). His research focuses on critical psychology and social constructionist approaches in mental health.

Andrew R. Thompson is Senior Lecturer in Clinical Psychology and Director of Research Training, at the NHS Clinical Psychology Training Unit, University of Sheffield. He is also Clinical Health Psychologist at the Rotherham NHS Foundation Trust and a practitioner of Cognitive Analytic Therapy.