Figure 5.

Meaningfulness and subjective effects on well-being and life satisfaction: (a) comparison to the retrospective assessment of the effects of psilocybin; figure adapted from Griffiths et al. (2006), which was a randomised controlled study (n = 24) in which effects of psilocybin (black column) were compared to methylphenidate (grey column) with regard to how experiences were retrospectively appraised by participants. Participants were asked how personally meaningful the experience had been when compared to everyday experiences, experiences which occur once a week, once a month, once a year, once every 5 years, top 10 or top five experiences of their lives, single most (lifetime) personally meaningful experience of their lives. Data from our study were added regarding exemplary Kambô session (green column). (b) Subjective rating on the long-term effects on current sense of personal well-being and life satisfaction. Participants rated from ‘decreased very much’ to ‘increased very much’.