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A popular example is Paul Ekman and his colleagues' cross-cultural study of 1992, in which they concluded that the six basic emotions are anger, disgust, fear, happiness, sadness, and surprise. [2] Ekman explains that there are particular characteristics attached to each of these emotions, allowing them to be expressed in varying degrees in a ...
It was later adopted by Paul Ekman and Wallace V. Friesen, and published in 1978. [2] Ekman, Friesen, and Joseph C. Hager published a significant update to FACS in 2002. [3] Movements of individual facial muscles are encoded by the FACS from slight different instant
Paul Ekman (born February 15, 1934) [1] is an American psychologist and professor emeritus at the University of California, San Francisco who is a pioneer in the study of emotions and their relation to facial expressions. [2] He was ranked 59th out of the 100 most eminent psychologists of the twentieth century in 2002 by the Review of General ...
In 1978 Ekman and Friesen updated Facial Action Coding System (FACS), originally developed by a Swedish anatomist Carl-Herman Hjortsjö. [7] [8] FACS is a tool for classification of all facial expressions that humans can make. Each component of facial movement is called an action unit (AU) and all facial expressions can be broken down to action ...
A facial expression database is a collection of images or video clips with facial expressions of a range of emotions. Well-annotated ( emotion -tagged) media content of facial behavior is essential for training, testing, and validation of algorithms for the development of expression recognition systems .
As Paul Ekman described, it is possible but unlikely for a person in this mood to show a complete anger facial expression. More often just a trace of that angry facial expression may be held over a considerable period: a tightened jaw or tensed lower eyelid, or lip pressed against lip, or brows drawn down and together. [25]
In most studies, participants are shown more than one facial expression (Ekman recommends six of each expression). However, people judge facial expressions relative to others that they have seen, [33] and participants who judge more than one facial expression have higher recognition rates than those who judge only one. [25]
Ekman noted that while universal expressions do not necessarily prove Darwin's theory that they evolved, they do provide strong evidence of the possibility. [5] He mentioned the similarities between human expressions and those of other primates , as well as an overall universality of certain expressions to back up Darwin's ideas.