"People's social circles do tend to shrink a little as they age — that is mainly where that stereotype comes from, but that image of the isolated elderly really falls apart when we broaden our definition of what social connection is," said study co-author Benjamin Cornwell, also a University of Chicago researcher.

The research rings true for 81-year-old George O'Hare, a retired Sears manager in Willowbrook, Ill. He's active with church and AARP and does motivational speaking, too. His wife is still living, and he's close to his three sons and four grandchildren.

"I'm very happy because I've made friends that are still living," O'Hare said. "I like to go out and speak in schools about motivation."

"Happiness is getting out and being with people, and that's why I recommend it," he said.

Ilse Siegler, an 84-year-old retired nurse manager in Chicago, has a slightly different perspective. Her husband died 35 years ago, and she says she still misses him every day.

She has vision problems and has slowed down with age. Yet she still swims, runs a social group in her condo building, volunteers in a retirement home and is active with her temple. These all help "make life more enjoyable," she said.