Uzzi then tallied his Q readings with information about how successful the productions had been.

NEWYORKER: Groupthink

Uzzi wanted to understand how the relationships of these team members affected the product.

NEWYORKER: Groupthink

The impulse to check messages frequently relates to a psychological principle called a variable reinforcement schedule, says Uzzi.

CNN: Why we can't unplug on vacation

It's hard to stop yourself from checking for those messages because they come through on a random basis, Uzzi says.

CNN: Why we can't unplug on vacation

According to Uzzi, this is what happened on Broadway during the nineteen-twenties, which he made the focus of a separate study.

NEWYORKER: Groupthink

Brian Uzzi, a sociologist at Northwestern, has spent his career trying to find what the ideal composition of a team would look like.

NEWYORKER: Groupthink

Uzzi sees musicals as a model of group creativity.

NEWYORKER: Groupthink

With work and personal life integrated into smartphones -- and messages from your boss just one click away from a map of your destination -- it's difficult to separate the two, Uzzi says.

CNN: Why we can't unplug on vacation

"You keep business on you, so to speak, when you're trying to keep on top of everything else in your life, " says Brian Uzzi, professor of leadership at Northwestern University's Kellogg School of Management.

CNN: Why we can't unplug on vacation