Shankar Vedantam

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Why do people sometimes give generously to a cause — and other times give nothing at all?

That's a timely question, because humanitarian groups fighting the Ebola outbreak need donations from people in rich countries. But some groups say they're getting less money than they'd expect from donors despite all the news.

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In recent years, social scientists have tried to find out whether important decisions are shaped by subtle biases. They've studied recruiters as they decide whom to hire. They've studied teachers, deciding which students to help at school. And they've studied doctors, figuring out what treatments to give patients. Now, researchers have trained their attention on a new group of influential people — state legislators.

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Medical tests are rarely a pleasant experience, especially if you're worried that something could be seriously wrong. That's true even though we know that regular screenings and tests often help doctors catch issues early.

In the land that came up with the phrase "Thank God it's Friday," and a restaurant chain to capitalize on the sense of relief many feel as the work week ends, researchers made an unusual finding in 2012.

Moms who worked full time reported significantly better physical and mental health than moms who worked part time, research involving more than 2,500 mothers found. And mothers who worked part time reported better health than moms who didn't work at all.

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From NPR news this is ALL THINGS CONSIDERED. I'm Melissa Block.

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Our David Greene recently discussed some new social science research with NPR's Shankar Vedantam.

DAVID GREENE, BYLINE: He's here in our studios again. Shankar, what's up?

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From Syria to Afghanistan, to Russia and Ukraine, the United States finds itself confronting some major foreign policy challenges. There are old rivalries and new one testing the limits of the United States.

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Lunch at the West Salem School District in Wisconsin.
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American kids have a problem with obesity, according to the

Ronald Heifetz has been a professor of public leadership at Harvard's Kennedy School for three decades, teaching classes that have included aspiring business leaders and budding heads of state. Each year, he says, the students start his course thinking they'll learn the answer to one question:

As leaders, how can they get others to follow them?

Heifetz says that whole approach is wrong.

What makes trick-or-treaters happy is candy. And more candy is better, right?

Well, it turns out that might not actually be the case. A few years ago researchers did a study on Halloween night where some trick-or-treaters were given a candy bar, and others were given the candy bar and a piece of bubble gum.

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John Hewitt is a neuroscientist who studies the biology of intelligence. He's also a parent. Over the years, Hewitt has periodically drawn upon his scientific knowledge in making parenting decisions.

"I'm a father of four children myself and I never worried too much about the environments that I was providing for my children because I thought, well, it would all work out in the end anyway — aren't the genes especially powerful?" Hewitt says.

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