Six Basic Emotions is a term that refers to the theory of American psychologists Paul Ekman and Wallace V. Friesen.
Ekman and Friesen identified six basic emotions based on studying the isolated culture of people from the Fori tribe in Papua New Guinea in 1972. The tribe members were able to identify these six emotions on the pictures.
After that, they took pictures of facial expressions of people from the Fori tribe with the same emotions and they presented these pictures to people of other races and cultures all over the world. They also interpreted the emotions on the pictures correctly.
Following six basic emotions were identified:
Gradually, many researches have confirmed that these emotions are universal for all human beings.
Following pictures depict above facial expressions:
Source: The Grimace Project
Use of the six basic emotions in practice:
They are used within the FACS methodology while evaluating microexpressions.