Aldous Huxley suggested that the psalm-singing of Christian and Buddhist monks, the chanting of medicine men and shamans, and the shouting and screaming of revivalists for hours on end bring about an increase in the carbon-dioxide level, triggering an altered state.

About James Alcock

James E. Alcock (born 24 December 1942) is Professor emeritus (Psychology) at York University (Canada). Alcock is a noted critic of parapsychology and a Fellow and Member of the Executive Council for the Committee for Skeptical Inquiry. He is a member of the Editorial Board of The Skeptical Inquirer, and...

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