Christopher Noel Cullen
Christopher Noel Cullen is a British psychologist who specialised in the field of learning disability. Life. Chris Cullen completed his PhD at Bangor University which at that time was the centre of radical behaviourism and its application to clinical issues. He recalls meeting with B.F. Skinner in London at that time. After working for a short period as a research assistant he trained in clinical psychology and developed an expertise in working with people with learning disabilities. He was appointed to the Chair of Learning Disabilities at St. Andrew's University and then, in 1995, moved to  Keele University as both Professor of Clinical Psychology and Clinical Director for Psychological Therapies for North Staffordshire. He retired as Emeritus Professor of Clinical Psychology. He was active in the British Psychological Society, of which he was the Chief National Assessor. He was elected President of the Society in 1997. His presidential address was on the topic of behaviour analysis in work and therapy. He was also elected President of the British Association for Behavioural and Cognitive Psychotherapies. Work. His clinical work focused on Acceptance and Commitment Therapy, one of the ‘third wave’ cognitive therapies arising out of radical behaviourism