Abstract
MR. H. G. WELLS disposes very aptly of most of the claims set up by Mr. Podmore and his colleagues to be real scientific investigators. But, I think, he rather disguises the significance of the card-drawing experiments to which he refers. The experiments of M. Richet and those of the S.P.R. belong to two very different categories. In the former case, 789 correct guesses were made in 2927 trials, or a deviation from the most probable result of 57 or 58; this is about 2˙4 times the standard deviation, or the odds against a deviation in excess of this amount are only about 100 to 1, or odds of only about 50 to 1 of a deviation of this magnitude either way.
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PEARSON, K. Peculiarities of Psychical Research. Nature 51, 153 (1894). https://doi.org/10.1038/051153a0
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DOI: https://doi.org/10.1038/051153a0
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