05/22/2026
When it comes to close friendships in late childhood, there may be a “sweet spot.” Kids with very few close friends tend to have more mental‑health difficulties, lower cognitive scores, and smaller brain areas involved in social connection (Shen et al., 2023). But having more and more close friends isn’t always better. After about five close friends, the benefits level off—and having too many close friends is actually linked to lower cognitive performance.
Brain imaging shows that the number of close friendships is tied to areas rich in opioid receptors—regions involved in bonding, reward, and social connection (Shen et al., 2023). Long‑term data also shows that both too few and too many close friends predicted more ADHD symptoms and lower crystallized intelligence (acquired knowledge) two years later. The takeaway: kids need meaningful friendships, but not an ever‑growing circle. Quality and balance matter more than sheer quantity.
If you want to improve your social skills, CRUX Psychology can help. We specialize in treating kids, teens, and adults with social anxiety and more. You can reach us at 1-844-888-2789 or info@cruxpsychology.ca. To learn more about our psychologists and how we can help you, visit https://cruxpsychology.ca/
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