Overview
- Participants who vaporized THC performed worse than placebo on 15 of 21 memory tests spanning verbal, visuospatial, prospective, source, false, and temporal order memory.
- The most pronounced effects involved false memories and source confusion, with users more likely to recall words never presented and misattribute where information originated.
- Prospective memory declined during intoxication, indicating reduced ability to remember intended future actions such as taking medication or attending appointments.
- Episodic content memory did not show a significant effect in this experiment, and the authors advise further study to clarify this outcome.
- The peer-reviewed research from Washington State University was published in the Journal of Psychopharmacology (DOI: 10.1177/02698811261416079).