Extra-Sensory Perception, by J. B. Rhine, [1934], at sacred-texts.com Click to enlarge Frontispiece: MAY FRANCES TURNER JUNE BAILEY A. J. LINZMAYER T. COLEMAN COOPER J. G. PRATT Mr. Pratt (assistant) was photographed while experimenting. [p. i] Extra-Sensory Perception J. B. RHINE, Ph. D. Associate Professor of Psychology Duke University With a Foreword by Professor WILLIAM McDOUGALL, F.R.S., D.Sc., M.B. And an Introduction by WALTER FRANKLIN PRINCE, Ph.D. Research Officer, B.S.P.R. [MARCH, 1934] BOSTON SOCIETY FOR PSYCHIC RESEARCH 719 Boylston Street, Boston, Mass. Click to enlarge Title Page [p. ii] G. W. Poole Printing Co., Boston Extra-Sensory Perception, by J. B. Rhine, [1934], at sacred-texts.com [p. iii] CONTENTS Foreword by Professor William McDougall Introduction by Dr. Walter Franklin Prince Page Author's Preface <page 1> Part I. General Introduction: Chapter 1. Clarification of the Problem <page 5> Chapter 2. Historical Background <page 14> Appendix to Chapter 2. Note on Mathematics of Probability Used in Evaluation of Results <page 31> Part II. The Experimental Results: Chapter 3. A General Survey <page 35> Chapter 4. The Earlier and Minor Experiments <page 46> Chapter 5. A. J. Linzmayer <page 59> Chapter 6. Charles E. Stuart <page 67> Chapter 7. Hubert E. Pearce, Jr. <page 72> Chapter 8. Five Other Major Subjects <page 86> Part III. Explanation and Discussion: Chapter 9. Elimination of Negative Hypotheses <page 109> Chapter 10. Physical Conditions in E.S.P. Functioning <page 116> Chapter 11. Some Physiological Conditions Affecting E.S.P <page 126> Chapter 12. The Psychological Conditions and Bearings of the Results <page 131> Chapter 13. E.S.P. from the Viewpoint of General Parapsychology <page 146> Chapter 14. Some General Biological Considerations. <page 153> Chapter 15. Summary and Concluding Remarks <page 161> Appendix to Chapter 15. Suggestions to Those Who Repeat These Experiments <page 166> Second Appendix. Higher Anti-Chance Values, with Table of Probability <page 168> Extra-Sensory Perception, by J. B. Rhine, [1934], at sacred-texts.com [p. iv] LIST OF ILLUSTRATIONS A. J. Linzmayer, May Frances Turner, June Bailey, F. Coleman, Cooper J. G. Pratt Frontispiece FACING PAGE Hubert Pearce calling a pack of Zener cards. The author recording 74 Scene of experiments in long distance pure clairvoyance by Pearce, supervised by Mr. Pratt 74 Mr. Zirkle doing pure telepathy with Miss Ownbey as agent 102 Graphs on pages 124, 125, 137, 138, 141, 159, 160 Extra-Sensory Perception, by J. B. Rhine, [1934], at sacred-texts.com [p. v] FOREWORD By Professor WILLIAM MACDOUGALL THE work reported in this volume is the first fruit of the policy of naturalization of "psychical research" within the universities. It goes far to justify that policy; to show, first, that a university may provide conditions that will greatly facilitate and promote this most difficult branch of science; secondly, that the university may benefit from such liberal extension of its field of studies. On the former head I will say nothing; it is for the instructed public to judge of the value of this work. On the second head, I may properly testify here that to the best of my judgment, the group of students who have taken part in this work have reaped in a high degree the chief benefits which scientific research has to offer, namely, discipline in careful experiment and observation, and in logical thinking, practice in faithful cooperation, and the gratification of pushing back the bounds of knowledge, in this case in a field of peculiar difficulty and significance. There has been no hysteria, no undue excitement, among this group of students, nor has this work unduly pre-occupied their minds to the detriment of other activities. Though it would be unseemly for me to pronounce upon the value of this work, I may properly say a few words to help the reader to form his estimate of it. On reading any report of observations in the field of psychic research, invariably there rises in my mind the question--What manner of man is this who so reports? And I find that my estimate of the validity and value of the report depends very largely upon the answer to that question. A report may appear to be above serious criticism; and yet a brief acquaintance with its author may suffice to deprive it (for me, at least) of all claim to serious consideration or, on the other hand, may convince me that its statements must (provisionally at least) be accepted at their full face value. I do not stop to explain or to justify this attitude of mine. I believe it is well justified and to be very general among all who are interested in this field. Therefore I may assume that readers of this report who have no personal acquaintance with the author will welcome a few words from me about him and some of his collaborators, while the author, recognizing the purity of my motive, will pardon my intrusion on his privacy. In introducing Dr. Joseph Banks Rhine to the reader, I must premise that almost all I have to say of him is true also of Dr. Louisa E. Rhine, his wife. Both have taken their doctorates in biology at the University of Chicago, both had begun promising careers as university teachers of [p. vi] biology, and both have resigned these. When Dr. J. B. Rhine burnt his boats, gave up his career in biology and came over to psychology and psychical research, it was with the full consent, endorsement, and parallel action of his wife--a unique and remarkable event in the history of this subject. For the Rhines are no monied amateurs. They are working scientists without worldly resources other than their earnings. When the facts become known to me I was filled with admiration and misgiving. Their action seemed to me magnificently rash. I had always plumed myself on indifference to worldly considerations; but here was a young couple who made me seem small, made me seem to myself a cautious, nay, a timid worldling. Nor was this action prompted by some overwhelming emotional and personal interest, such as the desire to make contact with some lost loved one. The motivation was, so far as I could and still can judge, the desire to work in the field that seemed to contain most promise of discoveries conducive to human welfare. Indeed in this age when we erect monuments to the boll-weevil, send up prayers for drought, pest and plague, and are chiefly concerned to make one ear of wheat grow where two grew before, it is difficult to retain enthusiasm for botanical research, unless one is a scientist of the peculiarly inhuman type. The action filled me, I say, not only with admiration but also with misgiving; for it appeared that I was in some measure unwittingly responsible. The Rhines, in pondering the question--What is most worth doing? To what cause can we give ourselves?--had come upon my Body and Mind and upon others of my writings, especially my plea for Psychical Research as a University Study; [**] and had determined to join forces with me at Harvard. Accordingly, Dr. Rhine arrived on my doorstep in Cambridge, Mass. one morning in June 1926, at the moment when I had completed the bestowal of my family and worldly possessions in two taxi cabs, with a view to begin a journey round the world, a journey which, owing to unforeseen alteration of my course, terminated in North Carolina. Nothing daunted, the Rhines spent the year at Harvard studying psychology and philosophy and in making acquaintance with Dr. W. F. Prince and the Boston S. P. R. And in the fall of 1927 they turned up at Duke University, as determined as ever to work in the field of psychic research, and, if possible, within the walls of a university. It was then I began to realize what manner of man I had to deal with. I found J. B. Rhine to be a ruthless seeker after truth, almost, I may say, a fanatical devotee of science, a radical believer in the adequacy of its methods and in their unlimited possibilities. He is one of those whole-hearted scientists for whom philosophy and theology are but preliminary skirmishings beyond the frontiers of scientific knowledge; one of those who will not admit a [p. vii] sphere of valuation in which philosophy must always retain her relative independence and prerogatives and responsibilities, no matter how greatly the province of science may be extended. When he comes into my room and finds me reading a book on metaphysics or religion, he scratches his head and (though he is too polite to utter his misgivings) wonders whether, after all, I, in my latter years, am becoming a . He has devoted much thought and study to the history of science and to the problem of scientific method. And he manifests in every relation the scrupulous honesty and regard for truth that befit such a student. Yet, though a fanatic devotee of science, he is very human in the best sense. He has again and again shown that he is ever ready to share his resources of every kind with those who are in need; a multitude of students, both men and women, bring their troubles to him, knowing that they will receive tactful sympathy and sound advice. And this power to inspire and attract the confidence of young people has been of no little value from the point of view of the researches reported in this volume. For it has overcome the initial difficulty of inducing students to participate in and to give time and effort to research of a kind which is looked at askance by the world in general and by the scientific world especially. The manifest sincerity and integrity of Dr. Rhine's personality, his striking combination of humane sympathy with the most single-minded devotion to truth have induced in his collaborators a serene confidence in the worthwhileness of the effort, and have set a tone which, to the best of my judgment, pervades the group and contributes an important, perhaps an indispensable condition, of the striking successes here reported. I cannot pretend to be intimately acquainted with all of those who have participated in the experiments. But I have some acquaintance with all of them and my impressions are entirely favorable. Four of those who have taken a prominent part have worked for some years in our department as senior and graduate students, and of them I can speak, with entire confidence, as students of the highest class, in respect of general training and ability, of scientific devotion and of personal integrity. A question that must rise in the mind of many a reader of this report may be formulated as follows:--Granting that Dr. Rhine is all that is here claimed for him, is it not possible that his collaborators have deceived or tricked him, perhaps with the benevolent desire to reward with positive results so earnest a seeker? My reply is that, if the experiments involved only some two or three collaborators and that during a brief period only, neither Dr. Rhine nor I could perhaps adduce any completely convincing objection to such interpretation; but in view of the considerable number of participants, often unknown to each other, and of the prolonged period of participation (extending in some cases through several years) it becomes wildly improbable that any such conspiracy of deception can have been [p. viii] successfully maintained throughout and under the constant variation of conditions, without any trace or indication of it coming to light. To which it may be added that the experimenters have been at special pains from the beginning to exclude by the conditions maintained, any possibility of deception, conscious or unconscious. Finally, I would testify that I have "sat in" at the experimentation on a number of occasions, and have in some instances personally conducted the experiments, and have failed to discover either any indication of lack of good faith or any serious flaw in the procedures followed. Footnotes ^vi:* A lecture included in the Symposium published by the Clark University Press in 1926, The Case for and Against Psychical Research, and reprinted in the recently published volume, Religion and the Science of Life. Extra-Sensory Perception, by J. B. Rhine, [1934], at sacred-texts.com [p. ix] INTRODUCTION By DR. WALTER FRANKLIN PRINCE My acquaintance with the author of this book dates from 1926. I early learned that he was keen to discover the indicia of deception within the field of psychic research, and at the same time, while open-minded, only to be convinced of any of its claims by a slow process of evidence and sound reasoning. My estimate of the qualifications of an ideal psychic researcher is very exacting, and already in that year, before I had any idea that he would find opportunity as a psychologist to devote much attention to psychic research, I earnestly wished that he might be able and inclined to do so. The momentous study here presented has what may be called, metaphorically, three dimensions. First, there is the unprecedently long period, about three years, during which experiments have been conducted until they reached a vast number. Secondly, we find that the co-operation, observation, and critical judgment of many persons both within and without the teaching staff of the psychological department of Duke University have been applied to the experiments at various stages. Thirdly, we note the waxing rigor of the main stream of the experimentation, and the diversity of methods employed not simply to pile up proof to astronomical proportions, but to isolate telepathy and clairvoyance, each from the other, to find out what measures enhanced and what detracted from results, and to acquire data to test this and that hypothesis of the processes involved. Many admirable series of experiments for extrasensory perception have been made by men of science and other men of university education and high mental endowment, especially since 1880, with some of earlier date. But in none of the particulars stated above can any of them compare with the great task accomplished at Duke University. To be sure, some of the series of trials reported in this book rest, prima facie, upon the good faith of unwitnessed experimenters. The author could well have afforded to omit all of these, for the host of experiments witnessed under rigid conditions are enormously sufficient to bring the odds against chance to tremendous figures. But he wished to tell the whole story. Pearce's 15,000 witnessed trials under diversified conditions alone would have been abundantly ample upon which to rest the case as regards proof. But it is certainly worth while to know if some subjects can get results better when alone and others can not and how the general progress under the two conditions compares. Besides, our [p. x] confidence in the reported unwitnessed results in some cases is established by finding that their subjects did as well or better under inspection. And it is hard to discredit those persons whose unwitnessed results declined against natural wish or displayed under analysis, as will be shown, striking analogies, which could not have been foreseen by the subjects, with results received under inspection. But let the reader discard all these which he will, there remains a huge block of evidence against which it would appear that skepticism must batter in vain. "Unconscious whispering" has had a larger place in psychical research discussion than it ever deserved, but in this report conditions under which, even though near the agent, the percipient could not have heard any such, and separation in different rooms and buildings, have banished this ghost. The discovery that some of the subjects did better at considerable distances is a noteworthy one. Some other writers have reported the reverse, but it may be that their subjects were too abruptly removed to a distance or that some other factor caused them to lose confidence. This report agrees with most others in the effects of mental comfort, calm, and abstraction in promoting success. But here much experimentation was done, expressly to measure the effects of various disturbances. So far as subjects were ill, their scores fell. But why should anyone not guess (that is, with all sensory data for judgment excluded) as well when ill as when well? Success declined when the percipient against his own desire was kept at the task until it was highly distasteful. But why should pure guessing be thus put at a disadvantage? At first, when conditions were suddenly changed as by the interception of a screen, scoring would fall, later to rise, and so also when a visitor was brought in while a series was in operation. A certain drug markedly and consistently lowered the ratio of "hits," another drug tended to restore the ratio. There is no conceivable way by which pure guessing could thus be affected. There appears to be no explanation save that the various disturbances, including the administering of a certain drug, unfavorably affected that mental state most productive of extra- sensory perception, and that another drug mysteriously affected that state favorably. The results of a single experiment may have great evidential force. Such an experiment has been lately reported by Mr. Theodore Besterman, a very careful and