According to the letter at bottom, that he sent years later to
Jan Ehrenwald, Einstein wrote the preface of "Mental Radio" purely out of friendship, without revealing "
my skepticism in respect to all such beliefs and theories". However, he was apparently sincere in his statement and belief that Sinclair was "
carrying out no conscious deception".
Where the book can be accessed online:
Mental Radio by Upton Sinclair
https://www.gutenberg.org/files/63693/63...3693-h.htm
EINSTEIN (preface): I have read the book of Upton Sinclair with great interest and am convinced that the same deserves the most earnest consideration, not only of the laity, but also of the psychologists by profession. The results of the telepathic experiments carefully and plainly set forth in this book stand surely far beyond those which a nature investigator holds to be thinkable.
On the other hand, it is out of the question in the case of so conscientious an observer and writer as Upton Sinclair that he is carrying on a conscious deception of the reading world; his good faith and dependability are not to be doubted. So if somehow the facts here set forth rest not upon telepathy, but upon some unconscious hypnotic influence from person to person, this also would be of high psychological interest. In no case should the psychologically interested circles pass over this book heedlessly.
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(wikipedia)
Mental Radio
https://en.wikipedia.org/wiki/Mental_Radio
EXCERPT: On the subject of occult and pseudoscience topics, Sinclair has been described as credulous. Martin Gardner wrote "As Mental Radio stands, it is a highly unsatisfactory account of conditions surrounding the clairvoyancy tests. Throughout his entire life, Sinclair has been a gullible victim of mediums and psychics." Gardner also wrote the possibility of sensory leakage during the experiment had not been ruled out:
In the first place, an intuitive wife, who knows her husband intimately, may be able to guess with a fair degree of accuracy what he is likely to draw—particularly if the picture is related to some freshly recalled event the two experienced in common. At first, simple pictures like chairs and tables would likely predominate, but as these are exhausted, the field of choice narrows and pictures are more likely to be suggested by recent experiences. It is also possible that Sinclair may have given conversational hints during some of the tests—hints which in his strong will to believe, he would promptly forget about. Also, one must not rule out the possibility that in many tests, made across the width of a room, Mrs. Sinclair may have seen the wiggling of the top of a pencil, or arm movements, which would convey to her unconscious a rough notion of the drawing.
When Mrs. Sinclair was tested by William McDougall under better precautions the results were less than satisfactory.
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Einstein and ESP
https://cdn.centerforinquiry.org/wp-cont...04/p53.pdf
EXCERPT: Einstein wrote in 1946 to
Jan Ehrenwald [...] A translation of Einstein's letter (the original is in German) follows...
(13 May 1946) Dear Dr. Ehrenwald:
I have read with great interest the introduction to your book, as well as the story of all the unpleasant experiences you have suffered, as many others among us have. I am happy that you succeeded in emigrating to this country, and I hope that you will find here the possibilities for fruitful work.
Several years ago I read the book by
Dr. Rhine. I have been unable to find an explanation for the facts which he enumerated. I regard it as very strange that the spatial distance between (telepathic) subjects has no relevance to the success of the statistical experiments. This suggests to me a very strong indication that
a nonrecognized source of systematic errors may have been involved.
I prepared the introduction to Upton Sinclair's book
because of my personal friendship with the author, and I did it
without revealing my lack of conviction, but also without being dishonest.
I admit frankly my skepticism in respect to all such beliefs and theories, a skepticism that is not the result of adequate acquaintance with the relevant experimental facts, but rather a lifelong work in physics.
Moreover, I should like to admit, that, in my own life, I have not had any experiences which would throw light on the possibility of communication between human beings that was not based on normal mental processes. I should like to add that, since the public tends to give more weight to any statement from me than is justified, because of my ignorance in so many areas of knowledge, I feel the necessity of exercising utmost caution and restraint in the held under discussion. I should, however, be happy to receive a copy of your publication.
With many regards,
Albert Einstein