When it comes to math, MRIs may be better than IQs — and even past math scores — at showing whether a tutor can help a child master everything from trapezoids to trigonometry.
A new study from the Stanford University School of Medicine says that the size and circuitry of certain parts of children’s brains are excellent predictors of how well they’ll respond to intensive math tutoring.
The researchers’ most surprising finding was that children’s IQ and math scores had no effect on tutoring outcomes, yet brain scan images “predicted how much a child would learn,” said Vinod Menon, a Stanford professor of psychiatry and behavioral sciences who was the study’s senior author.
The study was published online Monday in the journal Proceedings of the National Academy of Sciences.
Menon’s research team took MRI scans of 24 third-graders just before they underwent eight weeks of rigorous math tutoring. A control group of children also had their brains scanned, but they didn’t get any tutoring.
The kids who were tutored showed across-the-board gains in their arithmetic skills, with the levels of their improvement varying wildly — from 8 percent improvement up to 198 percent. The children in the control group showed no signs of improvement.
The researchers found that the kids who responded the best to tutoring tended to have a larger and more active hippocampus. Named after the Greek word for “seahorse,” the spirally hippocampus is known to play an important role in learning and memory. But its role in mastering specific skills — like math — hadn’t been explored until now.
Even more than its size, the hippocampus’s ability to get along with other parts of the brain was the biggest predictor of math success.
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