A meta-analytic analysis of the acute effects of MDMA on empathy and emotion recognition in humans

MDMA enhances emotional empathy but reduces accuracy in recognizing negative facial expressions such as sadness, fear, and anger. No significant effects were found on cognitive empathy or recognition of happy expressions. These findings come from a meta-analysis of studies using the Multifaceted Empathy Test and the Facial Emotion Recognition Task. Understanding these nuanced effects may help optimize therapeutic applications and safety considerations for MDMA-assisted psychotherapy, which is currently under regulatory review for post-traumatic stress disorder.

Study at a glance

Abstract

3,4-methylenedioxymethamphetamine (MDMA) is an amphetamine derivative known as an "entactogen," influencing emotional and social processing. Phase III clinical trials of MDMA-assisted psychotherapy for post-traumatic stress disorder have reported promising results, and MDMA-assisted therapy is currently under regulatory review. However, the precise mechanisms underlying positive treatment outcomes remain largely unknown. This meta-analysis aims to systematically synthesize existing data on the effects of MDMA on empathy and emotion recognition. Specifically, we focus on two established tasks, the Multifaceted Empathy Test (MET) and the Facial Emotion Recognition Task (FERT), to comprehensively evaluate MDMA's role in social cognition. Separate meta-analyses for each emotion tested in the FERT will help discern potential variations in MDMA's impact on specific emotional responses. Following PRISMA guidelines, we conducted the meta-analysis. The MET assesses cognitive and emotional empathy, while the FERT measures accuracy in identifying basic emotional expressions. Separate meta-analyses were performed for each emotion tested in the FERT. MDMA administration enhances emotional empathy but diminishes recognition accuracy of negative facial expressions (sadness, fear, anger). No significant effects on cognitive empathy or recognition of happy expressions were found. Understanding these nuanced effects may inform the optimization of therapeutic applications and considerations for safety in clinical settings. Further studies are warranted to elucidate the underlying psychological and neural mechanisms, emphasizing the importance of continued investigation into the multifaceted influence of MDMA on social cognition.