Abstract

The more crucial evidence for the occurrence of PK is divided into 3 chronological periods. The 1st period (1934-1946) included the experimental establishment of a direct influence of mental action upon falling dice in a long series of experiments largely centered in or directed from the parapsychology laboratory of Duke University. The 2nd period (1946-1951) produced independent confirmations of the PK effect in other research centers, 3 of which are singled out for review. During the 3rd period (1951 to date) more emphasis has been given to the investigation of the placement of tumbling objects by PK rather than to die-face orientation. A complete bibliography of periodical literature dealing with psychokinesis is given.