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?
Sentence (from "Ciarán O'Keeffe"): According to his own website, he completed his PhD at the University of Hertfordshire under the supervision of Richard Wiseman and Julia Buckroyd.
Relevant evidence: Yes