Across three double-blind, placebo-controlled microdosing studies (171 participants total), microdosing psilocybin did not broadly increase creativity. The only consistent effect was a small improvement in the quality of divergent thinking—meaning participants generated slightly more original ideas—but no improvement was seen in coming to a single correct solution (convergent thinking). Placebo effects were strong, especially among people with prior psychedelic experience. The takeaway: microdosing may subtly shift how ideas emerge, but it does not reliably boost creativity overall, and expectations play a major role.