The Psychology of the Psychic is a skeptical analysis of some of the most publicized cases of parapsychological research by psychologists David Marks and Richard Kammann.

Marks and Kammann give detailed descriptions of experiments conducted by parapsychology researchers as well as performances by psychic entertainers outside of the laboratory during the 1970s.

[3] 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.

But over the next three years of research, when we examined each dazzling claim of ESP, or psychokinesis (PK), we discovered that a simple, natural explanation was far more credible than a supernatural or paranormal one.

Researchers need to describe their procedures in more detail, both in print and in unpublished documentation available for inspection, especially if strong claims are made about the presence of psi in the data.

Critics need better access to relevant details; they also need to express their questions and doubts more effectively and specifically, if the interactions are to proceed in good faith.

"[14] David Marks acknowledged this criticism, as well as Morris' larger point that the authors had ignored a great deal of the research generally regarded as reliable in parapsychological circles, and therefore included more material on these studies in the second edition.