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Prenatal Nighttime Heat Linked to Autism Risk in 294,937-Child Cohort

MHD featured image for prenatal nighttime heat and autism risk.

A Kaiser Permanente Southern California cohort involving 294,937 children linked extreme prenatal nighttime heat to autism diagnosis by age 5, with stronger associations at the 99th percentile than the 90th percentile.1 Compared with nighttime minimum temperature, daytime maximum temperature did not show the same confirmed whole-pregnancy pattern. Research Highlights Nighttime heat carried the main signal: …

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Mothers of Children With IDD: Support Predicted Happiness

A 2026 study of 250 mothers of children with intellectual and developmental disabilities (IDDs) found that family burden was strongly tied to lower social support, lower family quality of life, and lower happiness. In the structural model, the burden-happiness link was explained by perceived support and family quality of life rather than a direct burden-to-happiness …

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Alcohol vs. Cannabis Cues: People Miss Marijuana Signs

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A 2026 survey of 467 University of Sydney undergraduate psychology students found that participants generated more and more accurate observable cues for alcohol intoxication than for cannabis intoxication.1 When unanswered cue fields were counted, accurate alcohol cues appeared in 63.2% of possible response slots, while accurate cannabis cues appeared in 37.3%. Research Highlights Alcohol cues …

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Coffee, Gut Microbes, Memory, and Impulsivity in 62 Adults

Stylized illustration of a coffee cup overlaid with gut bacteria silhouettes and brain neurons with neurotransmitter symbols, representing the gut-brain axis effects of habitual coffee intake.

Coffee is widely framed as cognitively friendly, but a 2026 prospective study from Boscaini et al. published in Nature Communications used shotgun metagenomics, metabolomics, and cognitive testing in 62 healthy adults to show that coffee drinkers and non-coffee drinkers differ on the gut microbiome, key neurotransmitter-related metabolites, and behavioral measures — with coffee drinkers showing …

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Parent Youth Quality-of-Life Scale Linked to Suicidality at r = -0.50

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A 2,251-child national parent-report preprint found that the 7-item Parent-report Nationwide Quality of Life Scale had internal reliability of alpha = 0.85 and correlated most strongly with suicidality (r = -0.50), depression (r = -0.47), and internalizing symptoms (r = -0.43).1 Research Highlights Reliability was solid for a brief scale: the 7-item parent P-NQLS showed …

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Workplace Mental Health Apps Split Outcomes: Anxiety Down, Wellbeing Up

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A 228-person randomized trial found a split result for workplace mental-health apps: executive-function training reduced anxiety and depressive symptoms at 12-week follow-up, while a self-guided CBT app improved workplace wellbeing without reducing symptoms.1 The mechanism claim was weaker than the outcome claim because measured executive-function change did not explain the improvements. Research Highlights 228 adults …

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