Marsh Chapel Experiment

[2] Prior to the Good Friday service, twenty graduate degree divinity student volunteers from the Boston area were randomly divided into two groups.

[5] Amidst other intriguing journal observations, in the entry titled "The Mushroom" Lee recounted, I had the feeling finally that Ralph [Metzner] was exceedingly aware of what was going on and didn't know what to do about it, except be somewhat embarrassed.

I again had the impression of the room being a vast sensorium, where all nuance and subtleties are vividly and emphatically experienced!One's intuitive powers are increased dramatically, which leads to qualities of understanding and communion and affection.

I again had a tremendous amount of sinus drainage, almost more than the previous time—although there was nothing revelatory about it....Timothy Leary, who had supervised the experiment without institutional approval, was dismissed from Harvard in 1963.

[3]: 13 [7] Psychedelic researcher Rick Doblin considered Pahnke's original study partially flawed due to incorrect implementation of the double-blind procedure, and several imprecise questions in the mystical experience questionnaire.

"[9] In 2002 (published in 2006), a study was conducted at Johns Hopkins University by Roland R. Griffiths that assessed mystical experience after psilocybin.