Smile

Are Smiles a Sign of Happiness?  Gold Metal Winners at the Olymic games

Duchenne Smile, Emotional Experience, and Autonomic Reactivity: A Test of the Facial Feedback Hypothesis

Physiological Effects of The Smile

Service with a smile and encounter satisfaction: Emotional contagion and appraisal mechanisms

Smile and (half) the world smiles with you, frown and you frown alone

Smiling without Interaction: The Role of Nonverbal Behavior in Noninteractive Consumer Persuasion Settings

Sociality of Solitary Smiling : Potentiation by an Implicit Audience

The contingent smile: A meta-analysis of sex differences in smiling

The Duchenne Smile: Emotional Expression and Brain Physiology II 

The effect of a woman’s smile on men’s courtship behavior

The effect of smiling on helping behavior: Smiling and good Samaritan behavior

The Stimulation of Smiles SIMS Model: Embodied Simulation and the Meaning of Facial Expression

The Strength of a Smile: Duchenne Smiles Improve Advertisement and Product Evaluations

The value of a smile: Game theory with a human face

What is smiling is beautiful and good

What’s in a smile: Cultural differences in the effects of smiling on judgments of trustworthiness

When did her smile drop: Facial mimicry and the influences of emotional state on the detection of change in emotional expression