How the stress of too little income changes the way people think

Being poor is stressful. That's no big surprise.

In a poll by NPR, the Robert Wood Johnson Foundation and the Harvard School of Public Health, 1 in 3 people making less than $20,000 a year said they'd experienced "a great deal of stress" in the previous month. And of those very stressed-out people, 70 percent said that money problems were to blame.

Scientists have long recognized that poverty can aggravate health problems. Now they're also beginning to understand that the stress of too little income actually changes the way people think.

How so? The reporter takes you into the life of Lauren Boria, a single mom from the Bronx in her early 30s.