. Author manuscript; available in PMC: 2011 Mar 8.

Published in final edited form as: J Psychopharmacol. 2008 Jul 1;22(6):621–632. doi: 10.1177/0269881108094300

Table 1.

Volunteer Ratings on the Pahnke-Richards Mystical Experience Questionnaire section of the State of Consciousness Questionnaire completed at the end of methylphenidate and psilocybin sessions, and again retrospectively for psilocybin at the 14-month follow-up ^a

Scale Description	Methylphenidate (post-session)^b (N=36)	Psilocybin (post-session) (N=36)	Psilocybin (14 months) (N=36)
Internal unity	0.26 (0.04)	0.73 (0.05)^*	0.71 (0.05)^*
External unity	0.22 (0.04)	0.64 (0.05)^*	0.67 (0.05)^*
Sacredness	0.38 (0.04)	0.80 (0.04)^*	0.78 (0.04)^*
Intuitive knowledge	0.32 (0.05)	0.74 (0.05)^*	0.73 (0.04)^*
Transcendence of time and space	0.27 (0.04)	0.75 (0.04)^*	0.75 (0.04)^*
Deeply felt positive mood	0.39 (0.04)	0.75 (0.04)^*	0.70 (0.05)^*
Ineffability and paradoxicality	0.33 (0.04)	0.80 (0.04)^*	0.78 (0.05)^*
Mean total score	0.33 (0.04)	0.76 (0.04)^*	0.75 (0.04)^*

Data are mean scores with 1 S.E.M. shown in parentheses; data are expressed as a proportion of the maximum possible score

For the 6 subjects who received methylphenidate on two sessions, the data are from the first session

Indicates significant difference from the post-methylphenidate condition (p<.05); there were no significant differences between the psilocybin post-session condition and the psilocybin 14-month follow-up