Overview
- A Science paper analyzing thousands of brain scans from the Adolescent Brain Cognitive Development study ranked socioeconomic measures — including the Child Opportunity Index — above 648 other variables as the strongest predictors of brain-wide patterns.
- The study found a characteristic ‘‘tired and stressed’’ pattern in functional brain maps that largely spares canonical cognitive regions, suggesting the differences reflect state-like arousal and sleep effects rather than fixed loss of cognitive ability.
- Apparent links between brain measures and cognitive test scores largely disappeared after researchers adjusted for socioeconomic status, shifting interpretation of prior SES–IQ correlations toward testing conditions and environment.
- Key limitations include data from only two ABCD timepoints and the absence of child-level polygenic risk scores, meaning genetic influences and longer-term developmental trajectories remain unresolved.
- Authors and accompanying commentators urge societal-level supports for families and targeted interventions to reduce chronic stress and improve sleep, noting these approaches could be inexpensive, reversible, and change how schools and clinicians interpret test results.