How this page evolved

Every published version is kept. Each entry shows what changed and why. Earlier versions can be restored by moderators, but only if the material they rely on is still available.

1. Revision 3Oct 4, 2026, 3:55 PMLiveAI-organised, reviewed

   Adds two recent systematic reviews: a meta-analysis finding a significant decrease in cognitive control with no effects in other cognitive domains, and a review of psilocybin microdosing finding low-certainty evidence and mostly mild adverse events. Also adds prevalence data on who microdoses and why, and notes that no reader contributions are yet available.

   • · The main finding was rewritten.
   • · Updated “Placebo-controlled trials”.
   • · Updated “Observational findings and the role of expectancy”.
   • · 3 new sources cited.
   • · The note on uncertainty changed.
   • · The key takeaways were revised.
   • · 1 new piece of guidance for specific situations.
   • · 1 new open question.
2. Revision 2Sep 30, 2026, 7:31 PMAI-organised, reviewed

   AI-prepared Starting Map from live research.

   • · First published version.