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Ecstasy (MDMA) and memory function: a meta‐analytic update

Keith R. Laws, Joy Kokkalis

Human Psychopharmacology: Clinical and Experimental July 10, 2007 DOI: 10.1002/hup.857 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Meta-analysis Peer reviewed
Population Ecstasy users and non-ecstasy users
Topics MDMA
Keywords Hallucinogen
Citations 75
Key findings Recreational ecstasy use is associated with moderate to large impairments in short-term and long-term memory, with verbal memory more affected than visual memory, and lifetime ecstasy dose does not predict memory performance.

Abstract

Abstract A meta‐analysis was conducted to examine the impact of recreational ecstasy use on short‐term memory (STM), long‐term memory (LTM), verbal and visual memory. We located 26 studies containing memory data for ecstasy and non‐ecstasy users from which effect sizes could be derived. The analyses provided measures of STM and LTM in 610 and 439 ecstasy users and revealed moderate‐to‐large effect sizes (Cohen's d ) of d = −0.63 and d = −0.87, respectively. The difference between STM versus LTM was non‐significant. The effect size for verbal memory was large ( d = −1.00) and significantly larger than the small effect size for visual memory ( d = −0.27). Indeed, our analyses indicate that visual memory may be affected more by concurrent cannabis use. Finally, we found that the total lifetime number of ecstasy tablets consumed did not significantly predict memory performance. Copyright © 2007 John Wiley & Sons, Ltd.

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