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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 ...
The Wizards Project was a research project at the University of California, San Francisco led by Paul Ekman and Maureen O'Sullivan that studied the ability of people to detect lies. The experts identified in their study were called "Truth Wizards". O'Sullivan spent more than 20 years studying the science of lying and deceit. [1]
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 ...
Furthermore, a cross-species analysis of facial expressions can help to answer interesting questions, such as which emotions are uniquely human. [21] The Emotional Facial Action Coding System (EMFACS) [22] and the Facial Action Coding System Affect Interpretation Dictionary (FACSAID) [23] consider only emotion-related facial actions. Examples ...
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 .
In 1978, Ekman and his colleague Wallace V. Friesen created a taxonomy of facial muscles and their actions, providing an objective measurement, whereby the system describes the facial behaviour being presented. This is known as the Facial Action Coding System (FACS). Previous coding systems had a more subjective approach, only attempting to ...
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]
The central concept of the Facial Action Coding System, or FACS, as created by Paul Ekman and Wallace V. Friesen in 1978 based on earlier work by Carl-Herman Hjortsjö [33] are action units (AU). They are, basically, a contraction or a relaxation of one or more muscles.