The Influence of Psychedelics on Fundamental Beliefs and Mental Health

The Influence of Psychedelics on Fundamental Beliefs and Mental Health - BSP (Belief Survey Psychedelics)

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00034097

Enrollment

1000

Registered

2024-04-18

Start date

2024-05-20

Completion date

Unknown

Last updated

2025-10-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Relationship between depression and beliefs in free will and determinism/fatalism, as well as the relationship between depression and the use of psychedelic substances.

Interventions

Group 1: Anonymous survey study, entry criteria: Age at least 18 years, at least one intake of a psychedelic substance, sufficient English language skills. The survey is conducted in English and may o

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: Sufficient knowledge of the English language, experience with psychedelic drug use

Exclusion criteria

Exclusion criteria: No experience with the use of psychedelics, Age < 18, Insufficient knowledge of the English language, Multiple participation in the same survey

Design outcomes

Primary

Measure	Time frame
The primary aim is to investigate links between beliefs about free will and determinism with psychedelic experiences and depression. Primary clinical parameters: - Frequency of use and details of relevant psychedelic substances - Free Will Inventory (FWI) Part 1 (Nadelhoffer et al., 2014) - Fatalistic Determinism subscale of the Fatalistic Determinism Questionnaire (FAD) (Paulhus and Carey, 2011) - Patient Health Questionnaire (PHQ-9) (Kroenke et al., 2001) - Psychiatric diagnosis (2 items)	—

Measure

Time frame

The primary aim is to investigate links between beliefs about free will and determinism with psychedelic experiences and depression. Primary clinical parameters: - Frequency of use and details of relevant psychedelic substances - Free Will Inventory (FWI) Part 1 (Nadelhoffer et al., 2014) - Fatalistic Determinism subscale of the Fatalistic Determinism Questionnaire (FAD) (Paulhus and Carey, 2011) - Patient Health Questionnaire (PHQ-9) (Kroenke et al., 2001) - Psychiatric diagnosis (2 items)

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Secondary

Measure	Time frame
The associations between beliefs about free will and determinism and other factors such as life satisfaction and meaning in life are also analyzed. Secondary clinical parameters: - 11 Dimensions Altered States of Consciousness Questionnaire (11D-ASC) (Studerus et al., 2010) - Affective valence of free will and determinism Determinism (2 self-formulated items) - Possibility Space Inventory (PSI, 11 self-formulated items) - Meaning in Life Questionnaire (MLQ) (Steger et al., 2006) - Locus of Control (Dehne and Schupp, 2007) - Life satisfaction (1 item from the socioeconomic panel)	—

Measure

Time frame

The associations between beliefs about free will and determinism and other factors such as life satisfaction and meaning in life are also analyzed. Secondary clinical parameters: - 11 Dimensions Altered States of Consciousness Questionnaire (11D-ASC) (Studerus et al., 2010) - Affective valence of free will and determinism Determinism (2 self-formulated items) - Possibility Space Inventory (PSI, 11 self-formulated items) - Meaning in Life Questionnaire (MLQ) (Steger et al., 2006) - Locus of Control (Dehne and Schupp, 2007) - Life satisfaction (1 item from the socioeconomic panel)

—

Contacts

Public ContactMichael Koslowski

Charité Universitätsmedizin Berlin

michael.koslowski@charite.de+4930450617079

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026