sentences:  In their attempts to replicate the studies of other researchers, the authors discover methodological flaws in the original trials that lead them to the conclusion that no evidence for psychic phenomena has yet been produced.They then discuss psychological research that attempts to explain why people believe in such phenomena in spite of this lack of evidence.In the 1970s, many of the students in their University of Otago psychology lectures had suggested to both Marks and Kammann that psychics, particularly Kreskin, were genuine and represented the cutting edge of psychological research.