Want to live a longer, happier life? Science says work to be more successful (but not in the way you might think)

You want to be happier. You want to feel more fulfilled. You want to live a longer, healthier life. Hold that thought. Lewis Terman, a Stanford University psychologist, was a pioneer in I.Q. testing. His revisions of the Stanford-Binet test helped it become a widespread tool for measuring general intelligence. In 1921, he identified 1,500 children who had scored 135 or higher on the test and began one of the longest longitudinal studies ever conducted. (The&nbsp...