Childhood trauma, especially emotional and physical abuse, is strongly linked to paranoia, and cannabis use amplifies that effect. In a survey of 4,736 adults, those who experienced childhood trauma reported higher paranoia, and weekly cannabis use—measured in standard THC units—also predicted greater paranoia. Cannabis use partially mediated the link between trauma and paranoia, though trauma itself had a much larger direct effect. The findings suggest that assessing both trauma history and cannabis exposure in standard THC units could improve risk detection and guide interventions for people with childhood trauma.
MDMA reliably enhances subjective social feelings such as sociability, emotional openness, closeness, and emotional empathy, but these changes do not consistently translate into observable prosocial behaviors like cooperation or trust, which remain highly context dependent. The most robust social effect is a reduction in the processing of social threat, including diminished sensitivity to negative social cues and impaired recognition of fear and anger. This divergence between felt and enacted social effects helps explain variability in laboratory findings and underscores the importance of context and measurement. These mechanisms may inform MDMA's therapeutic use for conditions involving heightened social threat and avoidance.