The NIH MRI Study of Normal Brain Development

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National Institutes of Health (NIH)/Journal of the International Neuropsychological Society

The first findings from the NIH’s large MRI Study of Normal Brain Development – the largest and most representative to date – provide new norms for cognition among healthy, school-age children. Researchers using Magnetic Resonance Imaging (MRI) since 1999 to document structural brain development and behavior in youth from birth to adulthood have concluded:

• Sex predicts few aspects of cognitive function, and most differences disappear by adolescence.

• Income predicts IQ and academic achievement.

• Age predicts performance on every measure of cognitive function. Free. 18 pages.