Question: Which Professor at the University of Hertfordshire in the United Kingdom has written several best-selling popular psychology books and has supervised other British psychologists such as Ciarán James O'Keeffe?

Context paragraphs:
Ciarán O'Keeffe: Ciarán James O'Keeffe (born 21 March 1971) is a British psychologist specialising in parapsychology and forensic psychology.  Prior to his academic psychology career he trained in contemporary arts and had a teaching position on the BA Art programme at the IADT (Institute of Art, Design & Technology) in Dublin, where he still holds an "Assistant Lecturer" position.  He is currently employed at Bucks New University.  He has held a research associate position at the University of Toulouse II - Le Mirail and also an online tutor position at Derby University.  Previously employed at Liverpool Hope University, lecturing in psychology with a parapsychology component, O'Keeffe is a member of the Society for Psychical Research and a senior advisor to The Ghost Club.  According to his own website, he completed his PhD at the University of Hertfordshire under the supervision of Richard Wiseman and Julia Buckroyd.

Linda Papadopoulos: Linda Papadopoulos is a Canadian psychologist of Greek Cypriot descent, based in England.  She is the author of books such as "Psychodermatology", "Becoming a Therapist", "Psychological Approaches to Dermatology", the popular psychology books "The Man Manual" and "What Men Say what Women Hear", which make the claim that there are inherent gender differences in relationships, and "Mirror Mirror: Dr. Linda's Body Image Revolution", a book on using cognitive behavioural therapy to promote a healthy body image.

George Jewsbury: George F. Jewsbury (born November 26, 1941) is an American historian who has collaborated on several best-selling textbooks in the "Civilization: Past & Present" series.  He joined authors T. Walter Wallbank, Alastair M. Taylor, and Nels M. Bailkey, beginning with the single volume fifth edition.  Jewsbury has also written several books on history, including "Russian Annexation of Bessarabia, 1774-1828".  He was a professor of history at Oklahoma State University, and is a specialist on Russia and the USSR.

Daniel J. Myers: Daniel J. Myers (born April 9, 1966, in Xenia, Ohio) is the Provost of Marquette University in Milwaukee, Wisconsin and a professor of Social and Cultural Sciences.  Formerly Vice President and Associate Provost for Faculty affairs and a professor of sociology at the University of Notre Dame, he left to become Provost at Marquette in 2015.  His best known research is on the urban unrest of the 1960s and the media coverage of those riots, specializing in identifying the patterns of unrest diffusion.  He has written several books and articles, and is co-author of the best-selling sociological social psychology textbook, "Social Psychology".

Scott Lilienfeld: Scott O. Lilienfeld (born December 23, 1960) is a professor of psychology at Emory University and advocate for evidence-based treatments and methods within the field.  He is known for his books "50 Great Myths of Popular Psychology", "Brainwashed", and others that explore and sometimes debunk psychological claims that appear in the popular press.  Along with having his work featured in major U.S. newspapers and journals such as "The New York Times", "The New Yorker", and "Scientific American", Lilienfeld has made television appearances on "20/20", CNN and the "CBS Evening News".

Richard Wiseman: Richard J. Wiseman (born 1966) is a Professor of the Public Understanding of Psychology at the University of Hertfordshire in the United Kingdom.  He has written several best-selling popular psychology books that have been translated into over 30 languages.  He has given keynote addresses to The Royal Society, The Swiss Economic Forum, Google and Amazon.  He is a fellow for the Committee for Skeptical Inquiry and a patron of the British Humanist Association.

James J. Jenkins: James J. Jenkins (July 29, 1923 – November 17, 2012), American psychology professor, played a significant role in the development of cognitive psychology.  Trained as an industrial psychologist, his early career was shaped by his Fellowship at the Social Science Research Council’s 1953 summer meeting that established the discipline of psycholinguistics.  He initially attempted to apply a modified version of behaviorism to the problems of language behavior, and while his “mediational” approach was very influential, he became convinced that it could not provide an adequate account of the structural nature of language as articulated by Noam Chomsky.  He continued research on language and cognition, eventually focusing on topics concerning speech perception (in collaboration with his wife, Winifred Strange).  His research was marked by an interest in new and even radical ideas (e.g., those advocated by James J. Gibson), a keen appreciation of the value of studying real-world problems (as in his early research on aphasia), and a willingness to give up cherished theories when the facts drove him to do so.  "If you're not making any progress toward understanding the problem," he said, "you've got to change."  He had an infectious enthusiasm for both research and teaching, and his impact on young psychologists was tremendous.  He supervised 46 PhD students in his first academic position at the University of Minnesota and through his career served as advisor or co-advisor of 82 PhD’s.  He is beloved by his students, whom he encouraged to follow their own diverse interests.  His students made many important contributions to psychological research (as just one example, the influential work on abstraction in memory done by his students John Bransford and Jeffrey Franks).

René Diekstra: René F.W. Diekstra (born 20 July 1946, Sneek) is a Dutch psychologist.  Apart from being a scientist, he is also well known as an author of popular psychology books.  He is also the developer of many psychological programs for policy and well-being and writes for the Staatscourant and a couple of magazines.

Robert S. Siegler: Robert S. Siegler (12 May 1949-) is an American psychologist and Teresa Heinz Professor of Psychology at Carnegie Mellon University.  He is a recipient of the American Psychological Association's 2005 Distinguished Scientific Contribution Award.  He specializes in the cognitive development of problem solving and reasoning in children.  Three areas of particular interest to his research are strategy choices, long-term learning, and educational applications of cognitive-developmental theory.  He proposed the 'overlapping waves' model of cognitive development in 1996.  Siegler received a B.A. in psychology from the University of Illinois in 1970 and a Ph.D. in psychology from SUNY Stony Brook in 1974, and he has been employed at Carnegie Mellon University ever since, where he was a colleague of Herbert A. Simon.  Siegler has authored and co-authored several books on cognitive development, including "How Children Discover New Strategies", "How Children Develop", "Children’s Thinking: 4th Edition", and "Emerging Minds", which was chosen as one of the Best Psychology Books of 1996 by the Association of American Publishers.  He also has served as associate editor of the journal Developmental Psychology.  He was a member of the National Mathematics Advisory Panel.

Tal Ben-Shahar: Tal Ben-Shahar (Hebrew: טל בן-שחר, also known as Tal David Ben-Shachar) born 1970, is an American and Israeli teacher, and writer in the areas of positive psychology and leadership.  As a lecturer at Harvard University, Ben-Shahar created the most popular course in Harvard's history.  He has subsequently written several best-selling books and in 2011 co-founded Potentialife with Angus Ridgway, a company that provides leadership programs based on the science of behavioral change to organisations, schools and sports organisations globally.

Supporting paragraphs: Ciarán O'Keeffe Richard Wiseman
Answer: Richard Wiseman