This book, by Charles T. Tart, world famous authority on altered states of consciousness, describes the results of a landmark study of 150 experienced marijuana users. What do they actually feel vs. propaganda about marijuana? Effects on vision, hearing, touch, social interaction, sexual sensations, space and time perception, thinking processes, spiritual experiences and ESP are among the many discussed. This is what can happen in the natural settings people use marijuana in, not the artificial conditions of the laboratory. This book will become the standard work on the subjective effects of marijuana.John Kaplan
Charles T. Tart was an American psychologist and parapsychologist known for his psychological work on the nature of consciousness (particularly altered states of consciousness), as one of the founders of the field of transpersonal psychology, and for his research in parapsychology.
A great read and the first full scientific study I have ever read. A lot of work has been done since the release of this study and things have come a long way. That being said, without this study many things would have taken a lot longer. Super in depth and at times even lol funny. Of interest to everyone #420 friendly and for those who want to know more about this amazing plant without having to test it's multifaceted properties for themselves.
Tart has a decent discussion of the methodological issues and challenges of this kind of research in the introductory chapters. Unfortunately, in practice, he fails to apply these insights to his analysis, and the methodological limitations and lack of statistical rigor make the findings of this study without validity and of no value.