ICL Communitas

## Summary The Communitas Scale is a psychometric tool designed to quantify the sense of community, unity, and shared humanity, referred to as "communitas," experienced during psychedelic ceremonies. It evaluates the social dimensions that play a significant role in the long-term outcomes of psychedelic interventions. This scale is particularly relevant for clinical research and therapeutic settings to measure psychological wellbeing and communal integration following psychedelic experiences.

## Instructions for Clinicians Clinicians are instructed to administer the Communitas Scale during observational studies and web-based survey research involving psychedelic ceremonies. The scale is applied at various time-points relative to the ceremony—pre-ceremony and at subsequent post-ceremony intervals. Clinicians are encouraged to consider the scale's results in conjunction with demographic data, psychological traits, and state variables to gain a comprehensive understanding of the participants' experiences.

## Scoring Methodology The Communitas Scale utilizes a Likert scale format, with responses varying from "Strongly disagree" to "Strongly agree" across items that pertain to ceremonial experiences. The internal consistency is well-validated, with a Cronbach's alpha of 0.92. Scores from the Communitas Scale are analyzed to deduce their relationship with long-term psychological wellbeing, using correlational and path analysis.

## Authors and Citation Key authors involved in the creation and validation of the Communitas Scale include H. Kettner, F. E. Rosas, C. Timmermann, L. Kärtner, R. L. Carhart-Harris, and L. Roseman. The pivotal study is titled "Psychedelic Communitas: Intersubjective Experience During Psychedelic Group Sessions Predicts Enduring Changes in Psychological Wellbeing and Social Connectedness," establishing the scale's credibility in assessing social dimensions during psychedelic sessions.

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