Occasional use of classic psychedelics linked to enhanced cognitive flexibility in young adults

Classic psychedelics such as LSD and psilocybin are reported as being associated with better cognitive flexibility in young adults rather than cognitive decline. A cross-sectional evaluation recruited 136 participants ages 18 to 50, comparing 84 lifetime psychedelic users to 52 non-users. All participants completed structured psychiatric screening and abstained from psychoactive substances for two weeks before testing, and the study used neuropsychological tasks covering attention, memory, visuospatial abilities, and executive functioning. Overall cognitive performance was broadly similar between groups, but psychedelic users showed an advantage on the Wisconsin Card Sorting Test, suggesting they were less likely to perseverate on an outdated strategy when sorting rules changed. Results also indicated a relationship between higher lifetime psychedelic use and fewer errors, while analyses adjusting for factors like education and alcohol use linked lifetime use to faster visual reaction times in a divided attention task. The findings are framed with major limitations including cross-sectional design, reliance on self-reported past use, potential confounds from other drug use, and the possibility that people with higher baseline flexibility may be more likely to experiment; the authors call for longitudinal before and after studies to clarify causality.