LZLynn Zhao

1. Article · Aug 13, 2026 · Lynn Zhao

   People Who Are Depressed Are More Vulnerable to Social Media Likes, Study Finds (opens the original)

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   Receiving likes feels good and may encourage users to post more. A recent study suggests that people with more depressive symptoms may be more sensitive to this social media effect. Using three different datasets of posts on X (formerly Twitter), researchers analyzed the posting behavior of more than 7,000 users based on their most recent 3,200 posts. People with depression are usually reluctant to expend effort, Yael Niv, senior author of the study and a computational neuroscientist at Princeto

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2. Article · Jul 18, 2026 · Lynn Zhao

   Different Ways Caffeine Affects Sleep (opens the original)

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   For many people, the day doesn’t officially begin until their first cup of coffee or tea. However, the same caffeine that helped people stay focused during the day also made it harder for them to fully rest at night. The study found that caffeine reduced brain activity associated with deep, restorative sleep while increasing activity linked to having a more awake brain. These effects were especially prominent during the first few hours of sleep, when restorative sleep normally occurs. Depending

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