Reviews three years of research on the effects of marihuana in man. Previously known clinical mental and physical effects have been confirmed. Causes and mechanisms of these effects generally remain undetermined in man and animals. Social implications and long term effects require additional study, although usage appears detrimental. (JM)

This article describes the distribution of mass in a hand-held object as a fundamental but unrecognized contributor to the sensation one receives from the object. Experiments producing fractions for human sensitivity are given. (SA)

Offers perspectives on the role of extrinsic factors in the aging process, the long-term consequences of extrinsically initiated changes, and implications for gerontological research. Explains the distinction between usual and successful aging in light of physiologic and psychosocial characteristics. (ML)

Describes the establishment of a psychological space for any set of stimuli by determining metric distances between the stimuli with the probability that a response learned for a stimulus will generalize to the other. (Author/TW)

Summarizes a report which attempted to determine the usefulness of various human potential technologies in military training programs. Includes information on sleep learning, accelerated learning, mental practice, biofeedback, group cohesion, split-brain effects, altered mental states, influence strategies, and parapsychology. (TW)