[2] From 1972 to 2019, he was an executive faculty member and the Alan Watts Professor of Psychology at Saybrook University in Oakland, California.

[3] Krippner has written extensively on altered states of consciousness, dream telepathy, hypnosis, shamanism, dissociation, and parapsychological subjects.

[4][8] In 1993, Krippner published the results of a number of dream telepathy experiments he conducted along with other researchers at Maimonides Medical Center.

[9][10][11][12][13] In a review of the research published in American Psychologist,[14] professor Irwin Child, former head of the Department of Psychology at Yale University, concluded that 'the tendency toward hits rather than misses cannot reasonably be ascribed to chance'.

But this favorable commentary has been criticized by a number of reviews and respondents, who argued that Krippner's work like most parapsychology severely lacked in rigor and instituting proper controls against bias.

Rock, and Lorenzo Di Risio, published an expanded meta-analysis of dream studies from 1966-2016, concluding with much the same wording as their 2003 review that "Combined effect sizes for both Maimonides and post-Maimonides studies suggest that judges may be able to use dream mentations to identify target materials correctly more often than would be expected by chance.

Science writer Martin Gardner found it surprising that Krippner took interest in Kulagina despite knowing that she was a "charlatan" who was caught on two occasions using tricks to move objects.

[28] Magician and noted skeptic Henry Gordon has written: A reading of Krippner's book, Human Possibilities, published by Doubleday, convinced me that there is a man sincere in his beliefs in the paranormal and bending over backward to be fair and open minded but incredibly naive.