One year-old Jamarion, left, greets his mom Lawuanna Troupe, 18, with a hug when she picks him up at day care at Vashion High School in St. Louis. Research shows children who’s mothers practice positive reinforcement have a larger hippocampus. (Laurie Skrivan/St. Louis Post-Dispatch/MCT)
Read the article: Hot Topics: Positive reinforcement may boost kids’ brains
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