From: Wired

There are 3 types of smile – reward, affiliation, dominance

Wired:

There are three distinct types of smile, a new study has revealed. People switch between ‘reward’, ‘affiliation’ and ‘dominance’ smiles, using different facial muscle combinations to make them, according to researchers from the University of Wisconsin-Madison.

“When distinguishing among smiles, both scientists and laypeople have tended to focus on true and false smiles,” said Paula Niedenthal, a psychology professor at the University of Wisconsin-Madison.

Read the whole story: Wired

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