Smiling really can make people feel happier, according to a new paper in Psychological Bulletin, which looked at nearly 50 years of data testing whether facial expressions can lead people to feel the emotions related to those expressions, based on more than 11,000 participants from around the world.

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Smiling really can make people feel happier, according to a new paper in Psychological Bulletin, which looked at nearly 50 years of data testing whether facial expressions can lead people to feel the emotions related to those expressions, based on more than 11,000 participants from around the world.