It's MORNING EDITION from NPR News. Good morning. I'm David Greene. Social scientists have learned over the years that they can't always trust what people tell them. Ask about their behavior and some people lie - even to themselves. You have to compare what people say to some measurement of what they actually do. That's what researchers did when looking at religious behavior in three parts of the Muslim world. Our colleague Steve Inskeep discussed this with NPR's Shankar Vedantam.
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