Every musician knows it: When you practice, you have to break a piece of music down, find the hard parts, and practice them. Over and over. And over. A new study confirms that prolonged focus on one ...

Here’s a study that may surprise you. A group of eight-year-olds practiced tossing beanbags into buckets in gym class. Half of the kids tossed into a bucket three feet away. The other half mixed it up ...