Psychology of smiling: Psychology says the barista whose smile crinkles their eyes isn't just doing customer service; Ekman's research found a real "Duchenne" smile is physiologically tied to genuine enjoyment

Discover how the Duchenne smile—characterized by crinkling eyes—differs from ordinary smiles, demonstrating a true expression of joy. Explore groundbreaking research on the psychology of smiling, and learn how to differentiate genuine emotions in social interactions.

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