Abstract

Examines several theories and models of psi and argues that while none is entirely satisfactory in explaining psi each seems to contain some fruitful ideas. Investigations of the "physical" hypotheses directed toward finding a new medium of psi communication will likely reveal the limiting conditions of psi. The "nonphysical" hypotheses are likely to be the ones that will provide insights into the psychological processes involved in psi cognitions. Acausal hypotheses have the merit of questioning some of the classical assumptions concerning S^target relationships. More than any others, the acausal hypotheses show the basic inappropriateness of the stimulus-response model of psi. (5 p ref)