Joseph Banks Rhine - Research

Research

Rhine tested many students as volunteer subjects in his research project. His first exceptional subject in this ESP research was Adam Linzmayer, an economics undergraduate at Duke. In the spring of 1931, Linzmayer scored very high in preliminary Zener-card tests that Rhine ran him through; initially, he scored 100% correct on two short (nine-card series) tests that Rhine gave him. Even in his first long test (a 300-card series), Linzmayer scored 39.6% correct scores, when chance would have been only 20%. He consecutively scored 36% each time on three 25-card series (chance being 20%). However, over time, Linzmayer's scores began to drop down much closer to (but still above) chance averages. Boredom, distraction, and competing obligations, on Linzmayer’s part, were conjectured as possible factors bearing on the declining test results. Linzmayer's epic run of naming 21 out of 25 took place in Rhine's car.

The following year, Rhine tested another promising individual, Hubert Pearce, who managed to surpass Linzmayer’s overall 1931 performance. (Pearce’s average during the period he was tested in 1932 was 40%, whereas chance would have been 20%). Pearce was actually allowed to handle the cards most of the time. He shuffled and cut them.

The most famous series of experiments from Rhine's laboratory is arguably the ESP tests involving Hubert Pearce and J. G. Pratt, a research assistant. Pearce was tested (using Zener cards) by Pratt, who shuffled and recorded the order of the cards in the parapsychology lab 100 yards from where Pearce was sitting in a campus library cubicle. The series comprised 37 25-trial runs, conducted between August 1933 and March 1934. From run to run, the number of matches between Pratt's cards and Pearce's guesses was highly variable, generally deviating significantly above-chance, but also falling dramatically below-chance. These scores were obtained irrespective of the distance between Pratt and Pearce, which was arranged as either 100 or 250 yards.

In 1934, drawing upon several years of meticulous lab research and statistical analysis, Rhine published the first edition of a book titled Extrasensory Perception, which in various editions was widely read over the next decades.

In the later 1930s, Rhine investigated “psychokinesis” – again reducing the subject to simple terms so that it could be tested, with controls, in a laboratory setting. Rhine relied on testing whether a subject could influence the outcome of tossed dice – initially with hand-thrown dice, later with dice thrown from a cup, and finally with machine-thrown dice.

In 1940 Rhine co-authored with J. G. Pratt and other associates at Duke Extra-Sensory Perception After Sixty Years, a review of all experimental studies of telepathy and clairvoyance that they could identify in scientific journals and other published sources. It has been recognized as the first meta-analysis in the history of science. In the course of reviewing their methods and findings, it rated the studies on evidentiality, examined hypotheses other than ESP, and discussed what generalizations might be drawn from them. Additionally, as many of those persons as possible who had published criticism of the research were sent drafts of the book, and invited to offer their comments for publication within it. Only three took up the offer, of which only one maintained an adamant criticism.

During the War years, Rhine lost most of his male staff members to war work or the military. This caused something of an hiatus in the conduct of new research, but the opportunity was taken to publish the large back-log of experiments that, since the early 1930s, had been conducted on psychokinesis. After the War, he had occasion to study some dramatic cases outside the lab.

Rhine’s wife, Dr. Louisa Rhine, pursued work that complemented her husband’s in the later 1940s, gathering information on spontaneous ESP reports (experiences people had, outside of a laboratory setting). Yet J. B. Rhine believed that a good groundwork should be laid in the lab, so that the scientific community might take parapsychology seriously.

In the early 1960s, Rhine left Duke and founded the Institute for Parapsychology which later became the Foundation for Research on the Nature of Man. In the 1970s, several high-scoring subjects – Sean Harribance, M.B. Dykshoorn, and Bill Delmore – were tested in the lab, shortly before Rhine’s retirement.