As Professor of Experimental Psychology at Cambridge, Zangwill occupied a position of enormous influence. This was partly because, in that era, the norm for UK academic departments was to have only a single faculty member with the title "Professor", who was also permanent head of department, and Experimental Psychology was the only branch of the discipline to have a university department at Cambridge. He was active both in the Experimental Psychology Society and the British Psychological Society. It can be argued that his influence in the two societies helped prevent their sometimes conflicting perspectives from leading to an open rift. He was always ready to advise and support those setting up new psychology degrees as the discipline spread through UK universities in the 1950s and 1960s, and served many departments as an external examiner both of undergraduate programmes and of PhDcandidates. As a result he exerted considerable influence at a period when UK psychology was expanding rapidly. Zangwill's research interests were mainly in neuropsychology, particularly brain lateralisation, at a time when these topics were not particularly fashionable. Much of his research was based at the National Hospital for Nervous Diseases, Queen Square, London, and he was always interested in the links between research and treatment. Self-deprecating about his own research, he saw himself as someone who could provide encouragement and support to others, and the renaissance of neuropsychology in the United Kingdom from the 1970s on owes much to his influence. As the professor and head of department at Cambridge, he also saw it as his responsibility to supervise any PhD students whose interests did not correspond to those of any of his colleagues. For example, he supervised the work of Liam Hudson, an unlikely member of an Experimental Psychology department, who nonetheless acknowledges his debt to him and describes him as, "a scholarly, preoccupied, subtle, and at times startlingly insightful, person". Recognising the part Zangwill played in the development of care for patients with neurological disorders, the East Cambridgeshire and Fenland NHS Primary Care Trust has named a research and treatment unit, the Oliver Zangwill Centre for Neuropsychological Rehabilitation, in his honour. This Centre has now formed part of Cambridgeshire PCT. Zangwill was married twice, to Joy Moult and to Shirley Tribe. With his first wife he had a son, David, who died in an accident as a baby; he later adopted his second wife's son Jeremy.
Other positions held
Visiting Psychologist, National Hospital for Nervous Diseases, London, 1947–79
Honorary Consulting Psychologist to United Cambridge Hospitals, 1969–1987
