Abstract

This report summarizes several experiments in which tests for extrasensory perception (ESP) and psychokinesis (PK) were evaluated in two ways. In some tests each trial was recorded as either a hit or a miss. In others, the responses were graded to take account of how far the wrong responses missed the target. Special "clock face" cards permitting scoring the subject\'s response in terms of the angular displacement from the target hour were used in the differential ESP tests. Statistically significant results were obtained in both the ESP and PK tests. There was a general tendency for the differential method of scoring to yield more significant results than scoring merely in terms of hits and misses.