REBUS

REBUS (from Relaxed Beliefs Under pSychedelics) is a model of effect concerning serotonergic psychedelics, associated with the theories of Karl Friston.

Further reading

• Zeifman, Ronald J.; Spriggs, Michael J.; Kettner, Henrik; Lyons, Tim; Rosas, Fernando; Mediano, Pedro; Carhart-Harris, Robin L. (2025). "From relaxed beliefs under psychedelics (REBUS) to revised beliefs after psychedelics (REBAS)". Scientific Reports. 15: 3651. doi:10.1038/s41598-023-28111-3. PMC 11779827.
• Carhart-Harris, Robin L.; Friston, Karl J. (2019). "REBUS and the Anarchic Brain: Toward a Unified Model of the Brain Action of Psychedelics". Pharmacological Reviews. 71 (3): 316–344. doi:10.1124/pr.118.017160. PMC 6588209.
• Zeifman, Ronald; Spriggs, Michael J.; Kettner, Henrik; Lyons, Tim; Rosas, Fernando; Mediano, Pedro; Carhart-Harris, Robin L. (2022-07-07). "From Relaxed Beliefs Under Psychedelics (REBUS) to Revised Beliefs After Psychedelics (REBAS): Preliminary Development of the RElaxed Beliefs Questionnaire (REB-Q)". OSF Preprints. doi:10.31234/osf.io/w8j6t. hdl:10044/1/100179.
• Meijer, Andy (2020-01-02). "The Rebus model: Understanding psychedelics' effects on the mind". Retrieved 13 August 2025.
• Safron, Adam; Juliani, Arthur; Reggente, Nicco; Klimaj, Victoria; Johnson, Matthew (2025). "On the varieties of conscious experiences: Altered Beliefs Under Psychedelics (ALBUS)". Neuroscience of Consciousness. 2025 (1) niae038. doi:10.1093/nc/niae038. PMC 11823823.