Depressive DisordersPTSDAnxiety DisordersEquity and Ethics

Increases in Psychological Flexibility Mediate Relationship Between Acute Psychedelic Effects and Decreases in Racial Trauma Symptoms Among People of Color

In a cross-sectional survey of 313 BIPOC, greater acute psychedelic insight and challenging experiences were associated with reductions in racial trauma symptoms, and increases in psychological flexibility partially mediated these relationships. The authors suggest psychedelics may reduce racial trauma among people of colour via enhanced psychological flexibility and recommend longitudinal clinical trials to test causality.

Authors

  • Albert Garcia-Romeu
  • Alan Davis
  • Nathan Sepeda

Published

Chronic Stress
individual Study

Abstract

Background

Previous research showed acute psychedelic effects were associated with decreases in racial trauma (RT) symptoms among black, indigenous, and people of color (BIPOC). Among samples comprised primarily of white participants, positive outcomes of psychedelic experiences have been mediated by increases in psychological flexibility. Therefore, we examined whether changes in psychological flexibility from before to after a psychedelic experience mediated the relationship between acute psychedelic effects and changes in RT symptoms among BIPOC.

Methods

This cross-sectional online survey study included 313 BIPOC (mean age = 33.1; SD = 11.2; female = 57%). A multiple linear regression analysis was used to examine the association between acute psychedelic effects and decreases in RT symptoms in a nonclinical setting; a path analysis was used to explore whether changes in psychological flexibility mediated this relationship.

Results

Acute insight and challenging effects were significantly ( p < .001) associated with decreases in RT symptoms following a psychedelic experience. Increases in psychological flexibility partially mediated relationships between greater intensity of psychological insight and less intensity of challenging experiences and decreases in RT symptoms ( ps<.001).

Conclusion

This research suggests psychedelics confer potential benefits in decreasing RT symptoms among BIPOC and psychological flexibility may be an important mediator of these effects. Future research should test this hypothesis in a longitudinal clinical trial among BIPOC.

Available with Blossom Pro

Research Summary of 'Increases in Psychological Flexibility Mediate Relationship Between Acute Psychedelic Effects and Decreases in Racial Trauma Symptoms Among People of Color'

Introduction

The paper frames racial trauma as a prevalent but under-researched form of trauma experienced by people of colour (POC), characterised by repeated or acute race-based threats that can contribute to PTSD symptoms and broader mental-health burden. The authors note that existing evidence-based PTSD treatments have limited inclusion of POC and that treatment dropout is high in these groups, highlighting a gap in culturally inclusive interventions. Parallel literatures on psychedelic compounds (for example psilocybin, LSD, and MDMA) indicate they can reduce depression and anxiety and that the intensity of acute subjective effects (mystical-type, insight, challenging) often predicts therapeutic benefit; however, clinical psychedelic trials have largely lacked racial and ethnic diversity. Davis and colleagues therefore set out to test whether changes in psychological flexibility mediate the relationship between acute psychedelic effects and reductions in racial trauma symptoms among Black, Indigenous, and people of colour (BIPOC). Drawing on prior survey and prospective work—largely in predominantly White samples—that linked acute mystical/insight experiences to improved outcomes via increases in psychological flexibility, the study hypothesised that (H1) acute mystical-type, challenging and insight effects would be associated with changes in racial trauma symptoms, (H2) acute effects would be directly related to changes in psychological flexibility, (H3) changes in psychological flexibility would be directly related to changes in racial trauma symptoms, and (H4) psychological flexibility would mediate the relationships between acute effects and trauma symptom change.

Expert Research Summaries

Go Pro to access AI-powered section-by-section summaries, editorial takes, and the full research toolkit.

Full Text PDF

Full Paper PDF

Create a free account to open full-text PDFs.

Study Details

References (32)

Papers cited by this study that are also in Blossom

Psilocybin with psychological support for treatment-resistant depression: an open-label feasibility study

Carhart-Harris, R. L., Bolstridge, M., Rucker, J. et al. · Lancet Psychiatry (2016)

1174 cited
Potential Therapeutic Effects of Psilocybin

Johnson, M. W., Griffiths, R. R. · Neurotherapeutics (2017)

An online survey of tobacco smoking cessation associated with naturalistic psychedelic use

Johnson, M. W., Garcia-Romeu, A., Johnson, P. S. et al. · Journal of Psychopharmacology (2017)

117 cited
5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT) used in a naturalistic group setting is associated with unintended improvements in depression and anxiety

Davis, A. K., So, S., Lancelotta, R. et al. · The American Journal of Drug and Alcohol Abuse (2019)

113 cited
People of color in North America report improvements in racial trauma and mental health symptoms following psychedelic experiences

Williams, T. M., Davis, A. K., Xin, Y. et al. · Drugs Education Prevention and Policy (2020)

Psilocybin for treatment-resistant depression: fMRI-measured brain mechanisms

Carhart-Harris, R. L., Roseman, L., Bolstridge, M. et al. · Scientific Reports (2017)

Effects of Psilocybin-Assisted Therapy on Major Depressive Disorder

Davis, A. K., Barrett, F. S., May, D. G. et al. · JAMA Psychiatry (2021)

1015 cited
Show all 32 references
Effects of ayahuasca on psychometric measures of anxiety, panic-like and hopelessness in Santo Daime members

Santos, R. G., Landeira-Fernandez, J., Strassman, R. J. et al. · Journal of Ethnopharmacology (2007)

Sub-acute and long-term effects of ayahuasca on affect and cognitive thinking style and their association with ego dissolution

Uthaug, M. V., Van Oorsouw, &. K., Kuypers, &. K. P. C. et al. · Psychopharmacology (2018)

Validation of the revised Mystical Experience Questionnaire in experimental sessions with psilocybin

Barrett, F. S., Johnson, M. W., Griffiths, R. R. · Journal of Psychopharmacology (2015)

Mystical experiences occasioned by the hallucinogen psilocybin lead to increases in the personality domain of openness

Maclean, K. A., Johnson, M. W., Griffiths, R. R. · Journal of Psychopharmacology (2011)

Psychological flexibility mediates the relations between acute psychedelic effects and subjective decreases in depression and anxiety

Davis, A. K., Barrett, F. S., Griffiths, R. R. · Journal of Contextual Behavioral Science (2020)

Psilocybin occasioned mystical-type experiences: immediate and persisting dose-related effects

Griffiths, R. R., Johnson, M. W., Richards, W. A. et al. · Psychopharmacology (2011)

Quality of acute psychedelic experience predicts therapeutic efficacy of psilocybin for treatment-resistant depression

Roseman, L., Nutt, D. J., Carhart-Harris, R. L. · Frontiers in Pharmacology (2018)

Cessation and reduction in alcohol consumption and misuse after psychedelic use

Garcia-Romeu, A., Davis, A. K., Fire Erowid et al. · Journal of Psychopharmacology (2019)

211 cited
The Challenging Experience Questionnaire: Characterization of challenging experiences with psilocybin mushrooms

Barrett, F. S., Bradstreet, M. P., Leoutsakos, J. M. S. et al. · Journal of Psychopharmacology (2016)

The entropic brain: a theory of conscious states informed by neuroimaging research with psychedelic drugs

Carhart-Harris, R. L., Leech, R., Shanahan, M. et al. · Frontiers in Human Neuroscience (2014)

143 cited
Phenomenology, Structure, and Dynamic of Psychedelic States

Preller, K. H., Vollenweider, F. X. · Behavioral Neurobiology of Psychedelic Drugs (2016)

Psilocybin-assisted therapy of major depressive disorder using Acceptance and Commitment Therapy as a therapeutic frame

Sloshower, J., Guss, J., Krause, R. et al. · Journal of Contextual Behavioral Science (2020)

The use of the psychological flexibility model to support psychedelic assisted therapy

Watts, R., Luoma, J. B. · Journal of Contextual Behavioral Science (2020)

Ayahuasca enhances creative divergent thinking while decreasing conventional convergent thinking

Kuypers, K. P. C., Riba, &. J., De La Fuente Revenga, &. M. et al. · Psychopharmacology (2016)

Development of the Psychological Insight Questionnaire among a sample of people who have consumed psilocybin or LSD

Davis, A. K., Streeter Barrett, F., Griffiths, R. R. et al. · Journal of Psychopharmacology (2021)

108 cited
Acute subjective effects in LSD- and MDMA-assisted psychotherapy

Schmid, Y., Gasser, P., Oehen, P. et al. · Journal of Psychopharmacology (2020)

72 cited
Psilocybin-assisted treatment for alcohol dependence: a proof-of-concept study

Bogenschutz, M. P., Forcehimes, A. A., Pommy, J. A. et al. · Journal of Psychopharmacology (2015)

Psilocybin-occasioned mystical experiences in the treatment of tobacco addiction

Garcia-Romeu, A., Griffiths, R. R., Johnson, M. W. · Current Drug Abuse Reviews (2015)

Cited By (11)

Papers in Blossom that reference this study

Psychedelic medicine: mechanisms, evidence, and translation to practice

Jacobs, E., Zahid, Z., Hinkle, J. et al. · BMJ (2026)

Insights on Psychedelics: A Systematic Review of Therapeutic Effects

Kugel, J., Laukkonen, R., Yaden, D. B. et al. · Neuroscience and Biobehavioral Reviews (2025)

6 cited
Neural Mechanisms of Resting-State Networks and the Amygdala underlying the Cognitive and Emotional Effects of Psilocybin

Stoliker, D., Novelli, L., Vollenweider, F. X. et al. · Biological Psychiatry (2024)

Predictors of psychedelic treatment outcomes among special operations forces veterans

Xin, Y., Armstrong, S. B., Averill, L. A. et al. · Psychology of Consciousness Theory Research and Practice (2023)

Impact of a Naturalistic Psychedelic Experience on Smoking: A Retrospective Survey

Romeo, B., Fauvel, B., Verroust, V. et al. · Journal of Psychoactive Drugs (2023)

Acute and enduring effects of naturalistic psychedelic use among Indigenous peoples in Canada and the United States

de la Salle, S., Gran-Ruaz, S., Davis, A. K. et al. · Canadian Psychology (2022)

8 cited
Show all 11 papers
Antidepressant effects of a psychedelic experience in a large prospective naturalistic sample

Nygart, V., Pommerencke, L. M., Haijen, E. et al. · Journal of Psychopharmacology (2022)

46 cited

Your Personal Research Library

Go Pro to save papers, add notes, rate studies, and organize your research into custom shelves.

Increases in Psychological Flexibility Mediate... — Research Summary & Context | Blossom