Eric M. J. Morris is a chartered consultant clinicalpsychologist and the psychology lead for early intervention forpsychosis at the South London and Maudsley NHS Foundation Trust,UK. Eric has been practising Acceptance and Commitment Therapy(ACT) for more than ten years, and researches mindfulness andacceptance interventions for psychosis at the Institute ofPsychiatry, King s College London. Eric is a highlyexperienced trainer and supervisor in contextual cognitivebehavioural therapies. Louise C. Johns is a chartered consultant clinicalpsychologist and coordinator of a specialist clinical service atthe Maudsley Hospital, London, UK, offering psychologicalinterventions for outpatients with psychosis. She is also anhonorary lecturer at the Institute of Psychiatry, King sCollege London. Since qualifying as a clinical psychologist in1998, she has worked in a clinical and research capacity in thefield of psychosis. She has published over 50 articles onpsychosis, covering development and psychopathology of symptoms,and cognitive behavioural treatments. She has led on the first UKfunded studies to evaluate ACT for psychosis in group settings. Joseph E. Oliver is a clinical psychologist currentlyworking in an early intervention programme for psychosis in SouthLondon, UK. He is also co-director of Contextual Consulting, an ACTbased consultancy, offering contextual-CBT training, supervisionand therapy. In addition to teaching and research supervision atKing s College London s Institute of Psychiatry, he hasactive research interests in the use of ACT for psychosis, in groupcontexts and in its potential to enhance workplace well-being.