Study: short videos linked to weaker attention in 98,000 people

A landmark review of short-form video research is in — and it is the biggest one yet. Led by Lan Nguyen at Griffith University, researchers pooled 71 studies covering 98,299 people into a meta-analysis published in Psychological Bulletin in September 2025.

The headline: heavier short-form video engagement was linked to poorer cognition, with a moderate effect (r = -.34). The strongest links were to attention (r = -.38) and inhibitory control — the brain's brake pedal for impulses (r = -.41). It also connected with more stress (r = -.34) and anxiety (r = -.33). The pattern held across youth and adult samples and across platforms — TikTok, Reels, Shorts.

The fine print matters, though. This is correlational evidence: association, not proof of cause. The attention finding — the one everyone quotes — drew on just 14 studies, all conducted in China, so we should be careful about generalizing it worldwide. And the trouble did not track with minutes watched: it clustered around addictive, compulsive use and emotional attachment to the apps, not raw screen time. People who felt hooked also reported more anxiety and stress — which may say as much about who leans on the apps as about what the apps do.

What can parents actually do? First, make homework a phone-free zone — sustained attention is the resource at stake. Second, watch the pattern, not the clock: compulsive, can't-put-it-down use is the real warning sign. Third, co-watch instead of solo binges — talk through what the feed serves up together.