Personality and Drug Use (PDU) (PDU)
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
The study aims to assess the association between the use of various substances (including psychedelic and non-psychedelic drugs) and personality profiles. Specifically, the association between past drug usage and personality profiles will be investigated. As psychedelics were found to influence changes in personality over time, the present study aims to measure both the current personality profile (via the Big Five Inventory-44 (BFI)) and perceived retrospective changes in personality (via a self-constructed Retrospective Personality Scale (RPS)). To our knowledge, no study has explored the diversity of substance use histories in relation to individual current and retrospective personality traits and aggregate personality profiles.
This project aims to survey a large number of participants from all around the world, using a mobile app-based survey. The remote character of the study will increase its accessibility and diversity, which are common shortcomings in the psychedelic line of research. Additionally, a remote, anonymous study setup with no face-to-face interactions might help overcome any potential concerns participants may have regarding the sharing of sensitive information (e.g., reports on illicit substance use).
To increase scientific transparency and for educational purposes, the study team plans to share results summaries (comparisons of personalized results with the aggregated ones among participants sharing similar characteristics e.g., age, substance use history), which might be an additional motivating factor for study completion. Lastly, given that drug use in the natural environment (excluding laboratory/experimental setting) is characterized by large substance diversity and poly-drug use, we aim for a large sample size (with a minimum of 36 subjects per substance(s) category) to perform subgroup analyses. Therefore, this large-scale, low-budget, naturalistic, retrospective, observational study aims to shed light on the aforementioned gap in the literature and to lay a foundation of evidence for further (observational and experimental) research within the field.
Undersøgelsestype
Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Prøveudtagningsmetode
Studiebefolkning
Beskrivelse
Inclusion Criteria:
- 18 years of age or older
- full legal and mental capacity
- access to a smartphone (iOS and Android) with internet
Exclusion Criteria:
- not fluent in English
- not able to read
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Observationsmodeller: Kohorte
- Tidsperspektiver: Tilbagevirkende kraft
Kohorter og interventioner
Gruppe / kohorte |
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Psychedelics-only Group
A group of participants who reported using in their past psychedelic substances only (both classical and non-classical psychedelics are included). Specifically, in the current study this group included reports on the following substances: Psilocybin (magic mushrooms, truffles) LSD (acid) Mescaline (peyote, san pedro) Dimethyltryptamine (DMT) Ayahuasca 5-MeO-DMT 3-MMC Ibogaine Salvia Phenethylamines (2C family) |
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Stimulants-only Group
A group of participants who reported using in their past drugs identified as stimulating compounds only (both recreational and prescribed usages are included). Stimulating compounds are considered, in the context of the current study, substances that increase the overall activity of the central nervous system. Specifically, in the current study this group included reports on the following substances: Cocaine Crack Amphetamines Methamphetamines Prescription stimulants (e.g., Adderall, Ritalin, Concerta) |
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Gruppe med kun depressiva
En gruppe af deltagere, der rapporterede, at de tidligere havde brugt stoffer, blev kun identificeret som deprimerende stoffer (både rekreativt og ordineret brug er inkluderet). Deprimerende stoffer betragtes i forbindelse med den aktuelle undersøgelse som stoffer, der nedsætter den samlede aktivitet af centralnervesystemet. Specifikt inkluderede denne gruppe i den aktuelle undersøgelse rapporter om følgende stoffer: Benzodiazepiner Opiater (rekreativt brug af heroin, opium, hydrocodon, oxycodon, oxymorfon, kodein, fentanyl) Receptpligtige opioider |
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Cannabinoidgruppen
En gruppe deltagere, der rapporterede, at de i deres tidligere tid kun brugte cannabinoidforbindelser (både rekreativt og ordineret brug er inkluderet). Specifikt inkluderede denne gruppe i den aktuelle undersøgelse rapporter om følgende stoffer: THC (cannabis, marihuana) CBD Medicinsk Cannabis (både THC og CBD) |
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Psychedelic and Non-psychedelic Substances Group
A group of participants who reported using in their past drugs identified as psychedelics and stimulants and/or depressants (both recreational and prescribed usages are included). In this group participants will be included who reported using at least one non-psychedelic drug additionally to a psychedelic one. Specifically, the following options were provided:
THC (cannabis, marijuana) Medical Cannabis (both THC and CBD) CBD MDMA (ecstasy) Ketamine Cocaine Crack Amphetamines Methamphetamines Prescription stimulants (e.g., Adderall, Ritalin, Concerta) Benzodiazepines Opiates (e.g., heroin, opium, hydrocodone, oxycodone, oxymorphone, codeine, fentanyl) Prescription opioids |
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Stofnaiv gruppe
En gruppe af deltagere, der ikke rapporterede tidligere erfaringer med nogen af stofferne, der er anført i den aktuelle undersøgelse, og som heller ikke har rapporteret at bruge andre stoffer (undtagen alkohol og nikotin).
Deltagerne vil blive tildelt denne gruppe, hvis og kun hvis de vælger "Ingen af ovenstående"-muligheden fra stofbrugsundersøgelsen (punkt 1).
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Current Personality Profile
Tidsramme: Single baseline measurement
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Raw scores on each of dimensions of the Big Five Inventory
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Single baseline measurement
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Changes in Personality Profile
Tidsramme: Single baseline measurement
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Raw scores on the positive and negative dimensions of the self-constructed (for the study needs) Retrospective Personality Scale
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Single baseline measurement
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Samarbejdspartnere og efterforskere
Efterforskere
- Ledende efterforsker: Kim PC Kuypers, PhD, Maastricht University
Publikationer og nyttige links
Generelle publikationer
- Kiraga MK, Mason NL, Uthaug MV, van Oorsouw KIM, Toennes SW, Ramaekers JG, Kuypers KPC. Persisting Effects of Ayahuasca on Empathy, Creative Thinking, Decentering, Personality, and Well-Being. Front Pharmacol. 2021 Oct 1;12:721537. doi: 10.3389/fphar.2021.721537. eCollection 2021.
- Bouso JC, Gonzalez D, Fondevila S, Cutchet M, Fernandez X, Ribeiro Barbosa PC, Alcazar-Corcoles MA, Araujo WS, Barbanoj MJ, Fabregas JM, Riba J. Personality, psychopathology, life attitudes and neuropsychological performance among ritual users of Ayahuasca: a longitudinal study. PLoS One. 2012;7(8):e42421. doi: 10.1371/journal.pone.0042421. Epub 2012 Aug 8.
- Bouso JC, Palhano-Fontes F, Rodriguez-Fornells A, Ribeiro S, Sanches R, Crippa JA, Hallak JE, de Araujo DB, Riba J. Long-term use of psychedelic drugs is associated with differences in brain structure and personality in humans. Eur Neuropsychopharmacol. 2015 Apr;25(4):483-92. doi: 10.1016/j.euroneuro.2015.01.008. Epub 2015 Jan 16.
- Williams MT, Davis AK, Xin Y, Sepeda ND, Grigas PC, Sinnott S, Haeny AM. People of color in North America report improvements in racial trauma and mental health symptoms following psychedelic experiences. Drugs (Abingdon Engl). 2021;28(3):215-226. doi: 10.1080/09687637.2020.1854688. Epub 2020 Dec 10.
- Martins SS, Sampson L, Cerda M, Galea S. Worldwide Prevalence and Trends in Unintentional Drug Overdose: A Systematic Review of the Literature. Am J Public Health. 2015 Nov;105(11):e29-49. doi: 10.2105/AJPH.2015.302843.
- Harm reduction: An approach to reducing risky health behaviours in adolescents. Paediatr Child Health. 2008 Jan;13(1):53-60. doi: 10.1093/pch/13.1.53. No abstract available.
Datoer for undersøgelser
Studer store datoer
Studiestart (Forventet)
Primær færdiggørelse (Forventet)
Studieafslutning (Forventet)
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- QCPUBLICPDU1
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
IPD-planbeskrivelse
IPD-delingstidsramme
IPD-delingsadgangskriterier
IPD-deling Understøttende informationstype
- Studieprotokol
- Statistisk analyseplan (SAP)
- Formular til informeret samtykke (ICF)
- Klinisk undersøgelsesrapport (CSR)
- Analytisk kode
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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Kliniske forsøg med Personlighed
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Hôpital le VinatierIkke rekrutterer endnuBorderline Personality Disorder BPDFrankrig
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University of California, Los AngelesRekrutteringBorderline personlighedsforstyrrelse | Borderline personlighed | BPD - Borderline Personality DisorderForenede Stater
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University Hospital, Strasbourg, FranceIkke rekrutterer endnuAutismespektrumforstyrrelse | Borderline Personality Disorder BPD | a Premenstruel Dysforisk Forstyrrelse (PMDD)