Δ9-Tetrahydrocannabinol During Encoding Impairs Perceptual Details yet Spares Context Effects on Episodic Memory

With the growing acceptance of cannabis use, it is crucial to understand the drug’s effects on episodic memory accuracy and distortion. We investigated the impact of the administration of Δ 9 -tetrahydrocannabinol (THC), the main psychoactive constituent of cannabis, on a context-based memory illusion. In a double-blind, placebo-controlled, within-subjects design, healthy infrequent cannabis users ( N = 24) memorized object pictures that were...