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NUMINOUS adj. /ˈnuːmɪnəs/ A term derived from the Latin numen, meaning "arousing spiritual emotion; mysterious or awe-inspiring."

Unlocking the Psyche: Introducing the Psychedelic Preparedness Scale

Article Title: Development and psychometric validation of a novel scale for measuring ‘psychedelic preparedness’

Authors: Rosalind G. McAlpine, George Blackburne, S. K. Kamboj

Publication Date: February 8, 2024

DOI: 10.1038/s41598-024-53829-z


The renaissance of psychedelic research has brought about the need for innovative tools that ensure the safety and efficacy of psychedelic experiences. A significant component of this process is the preparation of participants, which until now lacked a standardized measure.

Study Overview

This study introduces the Psychedelic Preparedness Scale (PPS), developed through a collaborative process that combined expert opinions and user experiences. The scale’s reliability and validity were tested across multiple groups, highlighting its potential as a tool for optimizing psychedelic therapy.

preparedness scale

Key Findings

The PPS consists of four factors: Knowledge-Expectations, Intention-Preparation, Psychophysical-Readiness, and Support-Planning. Its high reliability and validity underscore its potential to significantly impact the field of psychedelic therapy by enhancing preparatory practices.


The creation of the PPS represents a step forward in psychedelic research, offering a methodological framework that could improve the safety and outcomes of psychedelic experiences.


The scale’s predictive utility could revolutionize the preparatory phase of psychedelic therapy, potentially increasing its benefits and reducing risks.

Potential Application

Practitioners can use the PPS to gauge a participant’s readiness for a psychedelic experience, thereby tailoring preparatory efforts to maximize positive outcomes.


The Psychedelic Preparedness Scale is a valuable addition to the toolkit of researchers and therapists in the psychedelic field, promising to enhance the therapeutic process and participant outcomes.

preparedness scale

PPS and MEQ-30 Integration at the Numinous Ways Retreat

At our most recent retreat in the Netherlands, we began using PPS to explore how getting ready influences people’s chances of reaching deep, spiritual states, as shown by the Mystical Experience Questionnaire (MEQ-30). By combining PPS with tools like the MEQ-30, we’re able to check how well participants are prepared and how this readiness connects with the strength and depth of their mystical experiences. Understanding this link helps us see how important preparation is for having deep, life-changing psychedelic moments. With PPS, our guides can better prepare individuals for meaningful, life-altering experiences.


McAlpine, R. G., Blackburne, G., & Kamboj, S. K. (2024). Development and psychometric validation of a novel scale for measuring ‘psychedelic preparedness’. Scientific Reports, DOI: 10.1038/s41598-024-53829-z.


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