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A) Examples of the three smile types in the Smile Picture Set. From... | Download Scientific Diagram
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References in Esthetic evaluation of dynamic smiles with attention to facial muscle activity - American Journal of Orthodontics and Dentofacial Orthopedics
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PDF) Observers perceive the Duchenne marker as signaling only intensity for sad expressions, not genuine emotion
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Reconsidering the Duchenne Smile: Formalizing and Testing Hypotheses About Eye Constriction and Positive Emotion | SpringerLink
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PDF] Differential Reliance on the Duchenne Marker During Smile Evaluations and Person Judgments | Semantic Scholar
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People who have wrinkles around their eyes when they smile or frown are perceived as more sincere | Express Digest
Observers perceive the Duchenne marker as signaling only intensity for sad expressions, not genuine emotion - UCL Discovery
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