Abstract

Ss were tested for ability to identify targets (random orders of the Digits 1 and 2) concealed in opaque envelopes. The targets were of 2 sizes: hand -written numbers 12 mm. in height, and microfilmed reproductions which could only be read with a strong magnifying lens. In each test run the 2 sizes of symbols were intermixed and the S was not told which were which. The hits scored with the 2 kinds of symbols gave a positive deviation with the normal sized symbols and a negative deviation with the microfilmed ones. The difference points to a psychological interpretation rather than a purely physical effect of size of ESP targets.