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C. A Growing Experience That's All In The Mind

Narrator: This is Science Today. Thirty-five years ago researchers led by Marian Diamond, a professor of integrative biology at the University of California, Berkeley, had a hard time convincing others the brain could change with experience or enrichment.

Diamond: Nobody believed us because they thought the brain was immutable.

Narrator: Today, Diamond says there's a trend towards overstimulating young minds.

Diamond: I worry with overstimulation because our rats who get too many toys too fast don't show the same brain changes that those that get the toys given to them at reasonable intervals.

Narrator: And Diamond says it's not just the brain of a child that benefits from enrichment....

Diamond: But the brain of the teacher, of the parent. So when a parent is working with a child, his or her brain is changing as well. And the teachers can sometimes get bored - they think, oh my gosh, I've done this so long but if I keep using it and challenging, I can keep my brain active, too. So everybody benefits.

Narrator: For Science Today, I'm Larissa Branin.