Teen Wellbeing: Genes Explain 81% Stability, Life Events 1% Change
People expect life events to drive adolescent wellbeing — conflicts and breakups push it down, friendships and successes push it up. A 2026 longitudinal twin study from Skaug et al. tested this directly in 2,879 Norwegian twins followed from ages 12 to 20 across three waves and found that genetics, not events, explain most of …