Copyright 1972, Journal of Parapsychology. Reproduced with permission.
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PK TESTS WITH A HIGH-SPEED RANDOM NUMBER GENERATOR
By Helmut Schmidt
(Originally published in Journal of Parapsychology,
Vol. 36, Sept. 1972)
ABSTRACT: An electronic generator which could produce binary numbers
(+1 and -1) at rates up to 1,000 numbers per second was built and
used in some PK tests. The generated numbers were displayed to the
subject acoustically or visually. The acoustical display was provided by
a pair of headphones which presented each generated +1 or -1 by a click
in the right or left ear, respectively, and the subject tried to obtain
an increased click frequency in the target ear. The visual display
was given by the ink pen of a paper chart recorder. At the beginning
of the test the pen was in the center of the chart. During the test
run the deflection of the pen to the right or left was given by the
difference between the numbers of +1's and -1's generated so far. The
subject tried mentally to deflect the pen as far as possible in the target
direction. Tests were done with both displays at speeds of 30 and 300
numbers generated per second. Under all four of these conditions
statistically significant results were obtained.