Introducing the sick face

An argument for basic emotions

Paul Ekman · Cognition & Emotion · 1992 · 9.4K citations

Social Sciences, Evolutionary Biology, Psychology +9

Constants across cultures in the face and emotion.

Paul Ekman, Wallace V. Friesen · Journal of Personality and Social Psychology · 1971 · 5.4K citations

Social Sciences, Psychology, Social Psychology +17

Pictures of Facial Affect

Paul Ekman · Medical Entomology and Zoology · 1976 · 4.3K citations

Social Sciences, Behavioral Sciences, Psychology +11

The NimStim set of facial expressions: Judgments from untrained research participants

Nim Tottenham, James W. Tanaka, Andrew C. Leon et al. · Psychiatry Research · 2009 · 3.5K citations · Full text

Social Sciences, Psychology, Social Psychology +16

Pan-Cultural Elements in Facial Displays of Emotion

Paul Ekman, E. Richard Sorenson, Wallace V. Friesen · Science · 1969 · 1.8K citations

Social Sciences, Psychology, Social Psychology +17