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Hannes Kettner, MSc

Title(s)Postdoctoral Scholar, Neurology
SchoolSchool of Medicine
Address35 Medical Center Way, #1038
San Francisco CA 94143
PronounsHe/Him/His
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Researchers can login to make corrections and additions, or contact us for help. to make corrections and additions.
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    Altmetrics Details PMC Citations indicate the number of times the publication was cited by articles in PubMed Central, and the Altmetric score represents citations in news articles and social media. (Note that publications are often cited in additional ways that are not shown here.) Fields are based on how the National Library of Medicine (NLM) classifies the publication's journal and might not represent the specific topic of the publication. Translation tags are based on the publication type and the MeSH terms NLM assigns to the publication. Some publications (especially newer ones and publications not in PubMed) might not yet be assigned Field or Translation tags.) Click a Field or Translation tag to filter the publications.
    1. Effects of psychedelic use on authoritarian attitudes revisited. J Psychopharmacol. 2026 May 02; 2698811261443677. Simonsson O, Lyons T, Marks J, Kettner H, Roseman L, Haijen E, Kaelen M, Carhart-Harris R. PMID: 42068187.
      View in: PubMed   Mentions:    Fields:    
    2. Baseline Mood and "Relational Triad" Predict Acute Qualities of Psychedelic Experience. Behav Sci (Basel). 2026 Feb 23; 16(2). Lipson J, Kettner H, Carhart-Harris R, Miller L. PMID: 41750119; PMCID: PMC12937848.
      View in: PubMed   Mentions:
    3. Exploring the potential psychological predictors associated with changes in depression, anxiety, and well-being following naturalistic psychedelic use. J Psychiatr Res. 2025 Nov; 191:15-22. Herrmann FM, Jones G, Low DM, Zech JM, Carhart-Harris RL, Kettner H. PMID: 40945228.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    4. Validation of the Imperial Psychedelic Predictor Scale - CORRIGENDUM. Psychol Med. 2025 08 26; 55:e243. Angyus M, Osborn S, Haijen E, Erritzoe D, Peill J, Lyons T, Kettner H, Carhart-Harris R. PMID: 40856299; PMCID: PMC12404319.
      View in: PubMed   Mentions:    Fields:    
    5. Psychedelic Therapy, Positive Emotional Experiences, and the Central Role of Self-Compassion. Res Sq. 2025 Aug 22. Zeifman R, Danias G, Agin-Liebes G, Pagni B, Kettner H, Bhat V, Ross S, Erritzoe D, Carhart-Harris R. PMID: 40894046; PMCID: PMC12393679.
      View in: PubMed   Mentions:
    6. Improved mental health outcomes and normalised spontaneous EEG activity in veterans reporting a history of traumatic brain injuries following participation in a psilocybin retreat. Front Psychiatry. 2025; 16:1594307. Blest-Hopley G, Pasculli G, Ruffell SGD, Tsang W, Emmanuel O, Pate KM, Kettner H, Roseman L, Erritzoe D, Carhart-Harris R. PMID: 40842948; PMCID: PMC12364870.
      View in: PubMed   Mentions:
    7. Exploring the Therapeutic Effects of Psychedelics Administered to Military Veterans in Naturalistic Retreat Settings. Brain Behav. 2025 Jul; 15(7):e70660. Calnan M, Blest-Hopley G, Busch C, Adams M, Ruffell SGD, Piper T, Roseman L, Kettner H, Carhart-Harris R. PMID: 40619953; PMCID: PMC12230355.
      View in: PubMed   Mentions:    Fields:    Translation:HumansAnimals
    8. A Scoping Review of Research in Naturalistic Studies with Psychedelics. J Psychoactive Drugs. 2025 Jun 28; 1-14. Carvalho LC, Encantado J, Kettner H, Timmermann C, Veiga D, Teixeira PJ. PMID: 40581772.
      View in: PubMed   Mentions:    Fields:    
    9. Enhanced meaning in life following psychedelic use: converging evidence from controlled and naturalistic studies. Front Psychol. 2025; 16:1580663. Roseby W, Kettner H, Roseman L, Spriggs MJ, Lyons T, Peill J, Giribaldi B, Erritzoe D, Nutt DJ, Carhart-Harris RL. PMID: 40547590; PMCID: PMC12179068.
      View in: PubMed   Mentions: 1  
    10. Prediction of hallucinogen persisting perception disorder and thought disturbance symptoms following psychedelic use. PNAS Nexus. 2025 Apr; 4(4):pgae560. Zhou K, de Wied D, Carhart-Harris RL, Kettner H. PMID: 40264850; PMCID: PMC12012689.
      View in: PubMed   Mentions: 3  
    11. Dynamic medial parietal and hippocampal deactivations under DMT relate to sympathetic output and altered sense of time, space, and the self. Imaging Neurosci (Camb). 2025; 3. Pasquini L, Simon AJ, Gallen CL, Kettner H, Roseman L, Gazzaley A, Carhart-Harris RL, Timmermann C. PMID: 40800803; PMCID: PMC12319971.
      View in: PubMed   Mentions: 2  
    12. From relaxed beliefs under psychedelics (REBUS) to revised beliefs after psychedelics (REBAS). Sci Rep. 2025 01 29; 15(1):3651. Zeifman RJ, Spriggs MJ, Kettner H, Lyons T, Rosas FE, Mediano PAM, Erritzoe D, Carhart-Harris RL. PMID: 39881126; PMCID: PMC11779827.
      View in: PubMed   Mentions: 8     Fields:    Translation:Humans
    13. Preliminary Evidence of Sleep Improvements Following Psilocybin Administration, and their Involvement in Antidepressant Therapeutic Action. Curr Psychiatry Rep. 2024 Nov; 26(11):659-669. Reid MJ, Kettner H, Blanken TF, Weiss B, Carhart-Harris R. PMID: 39532819; PMCID: PMC11579049.
      View in: PubMed   Mentions:    Fields:    Translation:Humans
    14. Examining differences in the effects and contexts of naturalistic psilocybin use for White participants vs. Participants of Color: A longitudinal online survey study. J Affect Disord. 2025 Feb 01; 370:54-61. Jones G, Lowe MX, Nayak S, Sepeda N, Kettner H, Carhart-Harris R, Jackson H, Garcia-Romeu A. PMID: 39447981.
      View in: PubMed   Mentions: 1     Fields:    Translation:Humans
    15. Validation of the imperial psychedelic predictor scale. Psychol Med. 2024 Sep; 54(12):3539-3547. Angyus M, Osborn S, Haijen E, Erritzoe D, Peill J, Lyons T, Kettner H, Carhart-Harris R. PMID: 39327922; PMCID: PMC11496213.
      View in: PubMed   Mentions: 3     Fields:    
    16. Reply to Letter to the Editor: "Psychedelics in Older Adults: Difficulties of a Clear Therapeutic Evidence". Am J Geriatr Psychiatry. 2025 Jan; 33(1):118-119. Kettner H, Roseman L, Gazzaley A, Carhart-Harris RL, Pasquini L. PMID: 39393967.
      View in: PubMed   Mentions:    Fields:    
    17. Dynamic medial parietal and hippocampal deactivations under DMT relate to sympathetic output and altered sense of time, space, and the self. bioRxiv. 2024 Aug 12. Pasquini L, Simon AJ, Gallen CL, Kettner H, Roseman L, Gazzaley A, Carhart-Harris RL, Timmermann C. PMID: 38464275; PMCID: PMC10925211.
      View in: PubMed   Mentions: 1  
    18. Longitudinal experiences of Canadians receiving compassionate access to psilocybin-assisted psychotherapy. Sci Rep. 2024 07 17; 14(1):16524. de la Salle S, Kettner H, Thibault Lévesque J, Garel N, Dames S, Patchett-Marble R, Rej S, Gloeckler S, Erritzoe D, Carhart-Harris R, Greenway KT. PMID: 39019922; PMCID: PMC11254907.
      View in: PubMed   Mentions: 4     Fields:    Translation:Humans
    19. Psychological effects of psychedelics in adolescents. Front Child Adolesc Psychiatry. 2024; 3:1364617. Izmi N, Carhart-Harris RL, Kettner H. PMID: 39816600; PMCID: PMC11732004.
      View in: PubMed   Mentions: 7  
    20. Effects of Psychedelics in Older Adults: A Prospective Cohort Study. Am J Geriatr Psychiatry. 2024 09; 32(9):1047-1059. Kettner H, Roseman L, Gazzaley A, Carhart-Harris RL, Pasquini L. PMID: 38849218; PMCID: PMC11316630.
      View in: PubMed   Mentions: 5     Fields:    Translation:Humans
    21. Long-term benefits to psychological health and well-being after ceremonial use of Ayahuasca in Middle Eastern and North African immigrants and refugees. Front Psychiatry. 2024; 15:1279887. Lowe MX, Kettner H, Jolly DRP, Carhart-Harris RL, Jackson H. PMID: 38666090; PMCID: PMC11044680.
      View in: PubMed   Mentions:
    22. Improvements in well-being following naturalistic psychedelic use and underlying mechanisms of change in older adults: A prospective cohort study. Res Sq. 2024 Mar 08. Kettner H, Roseman L, Gazzaley A, Carhart-Harris R, Pasquini L. PMID: 38496492; PMCID: PMC10942571.
      View in: PubMed   Mentions:
    23. Psychiatric risks for worsened mental health after psychedelic use. J Psychopharmacol. 2024 03; 38(3):225-235. Marrocu A, Kettner H, Weiss B, Zeifman RJ, Erritzoe D, Carhart-Harris RL. PMID: 38491857; PMCID: PMC10944581.
      View in: PubMed   Mentions: 11     Fields:    Translation:Humans
    24. The Relationship Between Changes in Mindfulness and Subsequent Changes in Well-Being Following Psychedelic Use: Prospective Cohort Study. JMIR Form Res. 2024 Mar 04; 8:e54632. Jones G, Herrmann F, Bear A, Carhart-Harris R, Kettner H. PMID: 38437005; PMCID: PMC10949123.
      View in: PubMed   Mentions:    Fields:    
    25. Psychedelics and sexual functioning: a mixed-methods study. Sci Rep. 2024 02 07; 14(1):2181. Barba T, Kettner H, Radu C, Peill JM, Roseman L, Nutt DJ, Erritzoe D, Carhart-Harris R, Giribaldi B. PMID: 38326446; PMCID: PMC10850066.
      View in: PubMed   Mentions: 7     Fields:    Translation:Humans
    26. Interactions between classic psychedelics and serotonergic antidepressants: Effects on the acute psychedelic subjective experience, well-being and depressive symptoms from a prospective survey study. J Psychopharmacol. 2024 02; 38(2):145-155. Barbut Siva J, Barba T, Kettner H, Kuc J, Nutt DJ, Carhart-Harris R, Erritzoe D. PMID: 38281075; PMCID: PMC10863370.
      View in: PubMed   Mentions: 6     Fields:    Translation:Humans
    27. Preliminary evidence for the importance of therapeutic alliance in MDMA-assisted psychotherapy for posttraumatic stress disorder. Eur J Psychotraumatol. 2024; 15(1):2297536. Zeifman RJ, Kettner H, Ross S, Weiss B, Mithoefer MC, Mithoefer AT, Wagner AC. PMID: 38174611; PMCID: PMC10769553.
      View in: PubMed   Mentions: 7     Fields:    Translation:Humans
    28. The ego in psychedelic drug action - ego defenses, ego boundaries, and the therapeutic role of regression. Front Neurosci. 2023; 17:1232459. Buchborn T, Kettner HS, Kärtner L, Meinhardt MW. PMID: 37869510; PMCID: PMC10587586.
      View in: PubMed   Mentions: 7  
    29. Co-use of MDMA with psilocybin/LSD may buffer against challenging experiences and enhance positive experiences. Sci Rep. 2023 08 22; 13(1):13645. Zeifman RJ, Kettner H, Pagni BA, Mallard A, Roberts DE, Erritzoe D, Ross S, Carhart-Harris RL. PMID: 37608057; PMCID: PMC10444769.
      View in: PubMed   Mentions: 10     Fields:    Translation:Humans
    30. Human brain effects of DMT assessed via EEG-fMRI. Proc Natl Acad Sci U S A. 2023 03 28; 120(13):e2218949120. Timmermann C, Roseman L, Haridas S, Rosas FE, Luan L, Kettner H, Martell J, Erritzoe D, Tagliazucchi E, Pallavicini C, Girn M, Alamia A, Leech R, Nutt DJ, Carhart-Harris RL. PMID: 36940333; PMCID: PMC10068756.
      View in: PubMed   Mentions: 77     Fields:    Translation:Humans
    31. Among psychedelic-experienced users, only past use of psilocybin reliably predicts nature relatedness. J Psychopharmacol. 2023 01; 37(1):93-106. Forstmann M, Kettner HS, Sagioglou C, Irvine A, Gandy S, Carhart-Harris RL, Luke D. PMID: 36601974; PMCID: PMC9834326.
      View in: PubMed   Mentions: 3     Fields:    Translation:Humans
    32. Effects of psilocybin versus escitalopram on rumination and thought suppression in depression. BJPsych Open. 2022 Sep 06; 8(5):e163. Barba T, Buehler S, Kettner H, Radu C, Cunha BG, Nutt DJ, Erritzoe D, Roseman L, Carhart-Harris R. PMID: 36065128; PMCID: PMC9534928.
      View in: PubMed   Mentions: 22  
    33. The Watts Connectedness Scale: a new scale for measuring a sense of connectedness to self, others, and world. Psychopharmacology (Berl). 2022 Nov; 239(11):3461-3483. Watts R, Kettner H, Geerts D, Gandy S, Kartner L, Mertens L, Timmermann C, Nour MM, Kaelen M, Nutt D, Carhart-Harris R, Roseman L. PMID: 35939083; PMCID: PMC9358368.
      View in: PubMed   Mentions: 51     Fields:    Translation:Humans
    34. Antidepressant effects of a psychedelic experience in a large prospective naturalistic sample. J Psychopharmacol. 2022 08; 36(8):932-942. Nygart VA, Pommerencke LM, Haijen E, Kettner H, Kaelen M, Mortensen EL, Nutt DJ, Carhart-Harris RL, Erritzoe D. PMID: 35924888; PMCID: PMC9353970.
      View in: PubMed   Mentions: 21     Fields:    Translation:Humans
    35. Therapeutic Alliance and Rapport Modulate Responses to Psilocybin Assisted Therapy for Depression. Front Pharmacol. 2021; 12:788155. Murphy R, Kettner H, Zeifman R, Giribaldi B, Kartner L, Martell J, Read T, Murphy-Beiner A, Baker-Jones M, Nutt D, Erritzoe D, Watts R, Carhart-Harris R. PMID: 35431912; PMCID: PMC9009076.
      View in: PubMed   Mentions: 60  
    36. Validation of the Psychological Insight Scale: A new scale to assess psychological insight following a psychedelic experience. J Psychopharmacol. 2022 01; 36(1):31-45. Peill JM, Trinci KE, Kettner H, Mertens LJ, Roseman L, Timmermann C, Rosas FE, Lyons T, Carhart-Harris RL. PMID: 34983255; PMCID: PMC8801624.
      View in: PubMed   Mentions: 49     Fields:    Translation:Humans
    37. Psychedelics alter metaphysical beliefs. Sci Rep. 2021 11 23; 11(1):22166. Timmermann C, Kettner H, Letheby C, Roseman L, Rosas FE, Carhart-Harris RL. PMID: 34815421; PMCID: PMC8611059.
      View in: PubMed   Mentions: 58     Fields:    
    38. Psychedelic experience dose-dependently modulated by cannabis: results of a prospective online survey. Psychopharmacology (Berl). 2022 May; 239(5):1425-1440. Kuc J, Kettner H, Rosas F, Erritzoe D, Haijen E, Kaelen M, Nutt D, Carhart-Harris RL. PMID: 34734314; PMCID: PMC9110465.
      View in: PubMed   Mentions: 15     Fields:    Translation:HumansAnimals
    39. Turn on, Tune in, and Drop out: Predictors of Attrition in a Prospective Observational Cohort Study on Psychedelic Use. J Med Internet Res. 2021 07 28; 23(7):e25973. Hübner S, Haijen E, Kaelen M, Carhart-Harris RL, Kettner H. PMID: 34319246; PMCID: PMC8367105.
      View in: PubMed   Mentions: 14     Fields:    Translation:Humans
    40. Sustained, Multifaceted Improvements in Mental Well-Being Following Psychedelic Experiences in a Prospective Opportunity Sample. Front Psychiatry. 2021; 12:647909. Mans K, Kettner H, Erritzoe D, Haijen ECHM, Kaelen M, Carhart-Harris RL. PMID: 34267683; PMCID: PMC8277190.
      View in: PubMed   Mentions: 28  
    41. Psychedelics and health behaviour change. J Psychopharmacol. 2022 01; 36(1):12-19. Teixeira PJ, Johnson MW, Timmermann C, Watts R, Erritzoe D, Douglass H, Kettner H, Carhart-Harris RL. PMID: 34053342; PMCID: PMC8801670.
      View in: PubMed   Mentions: 38     Fields:    Translation:Humans
    42. Can pragmatic research, real-world data and digital technologies aid the development of psychedelic medicine? J Psychopharmacol. 2022 01; 36(1):6-11. Carhart-Harris RL, Wagner AC, Agrawal M, Kettner H, Rosenbaum JF, Gazzaley A, Nutt DJ, Erritzoe D. PMID: 33888025; PMCID: PMC8801625.
      View in: PubMed   Mentions: 27     Fields:    Translation:Humans
    43. Association Between Lifetime Classic Psychedelic Use and Hypertension in the Past Year. Hypertension. 2021 05 05; 77(5):1510-1516. Simonsson O, Hendricks PS, Carhart-Harris R, Kettner H, Osika W. PMID: 33677982.
      View in: PubMed   Mentions: 14     Fields:    Translation:Humans
    44. Post-Psychedelic Reductions in Experiential Avoidance Are Associated With Decreases in Depression Severity and Suicidal Ideation. Front Psychiatry. 2020; 11:782. Zeifman RJ, Wagner AC, Watts R, Kettner H, Mertens LJ, Carhart-Harris RL. PMID: 32903724; PMCID: PMC7438781.
      View in: PubMed   Mentions: 49  
    45. From Egoism to Ecoism: Psychedelics Increase Nature Relatedness in a State-Mediated and Context-Dependent Manner. Int J Environ Res Public Health. 2019 12 16; 16(24). Kettner H, Gandy S, Haijen ECHM, Carhart-Harris RL. PMID: 31888300; PMCID: PMC6949937.
      View in: PubMed   Mentions: 51     Fields:    Translation:Humans
    46. Predicting Responses to Psychedelics: A Prospective Study. Front Pharmacol. 2018; 9:897. Haijen ECHM, Kaelen M, Roseman L, Timmermann C, Kettner H, Russ S, Nutt D, Daws RE, Hampshire ADG, Lorenz R, Carhart-Harris RL. PMID: 30450045; PMCID: PMC6225734.
      View in: PubMed   Mentions: 166  
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