Dr Devin Terhune – The effects of microdose LSD on time perception and response to suggestion
The effects of microdose LSD on time perception and response to suggestion
As attention to microdosing increases, it is important to elucidate its impact on cognition and perception as well as top-down regulation of these functions. I will present two randomized, double-blind, placebo-controlled microdose LSD studies. In the first study, participants completed a temporal reproduction task. The LSD conditions were reliably characterized by over-reproduction of temporal intervals of 2000 ms and longer.
In the second study, participants were given associative suggestions prior to completing a colour-shape association task. In the LSD conditions, participants displayed greater performance for suggested than unsuggested associations. These results suggest that microdose LSD produces temporal over-reproduction and enhances response to suggestion. I will conclude by considering multiple interpretations of these results including those drawn from Bayesian and predictive coding models.
Filmed at Breaking Convention 2019. Sponsored by the Beckley Foundation.