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  2. Facial expression - Wikipedia

    en.wikipedia.org/wiki/Facial_expression

    Facial expression is the motion and positioning of the muscles ... Participants were shown a set of unfamiliar faces with either happy or angry facial expressions ...

  3. List of facial expression databases - Wikipedia

    en.wikipedia.org/wiki/List_of_facial_expression...

    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 .

  4. Microexpression - Wikipedia

    en.wikipedia.org/wiki/Microexpression

    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]

  5. Frown - Wikipedia

    en.wikipedia.org/wiki/Frown

    Illustration of facial muscles and other tissue of the lateral human head and neck. It is a long-held belief that it takes more muscles to frown than it does to smile. [16] It is difficult to determine exactly how many muscles are involved in smiling or frowning as there is a wide range of facial expressions that might be considered a frown or ...

  6. Resting bitch face - Wikipedia

    en.wikipedia.org/wiki/Resting_bitch_face

    Actress Kristen Stewart.The term has often been applied to describe her resting face, which she has acknowledged. [1]Resting bitch face (RBF) is a facial expression that unintentionally creates the impression that a person is angry, annoyed, irritated, or contemptuous, particularly when the individual is relaxed, or resting.

  7. Anger - Wikipedia

    en.wikipedia.org/wiki/Anger

    Facial expressions can range from inward angling of the eyebrows to a full frown. [6] While most of those who experience anger explain its arousal as a result of "what has happened to them", psychologists point out that an angry person can very well be mistaken because anger causes a loss in self-monitoring capacity and objective observability. [7]

  8. Emotion classification - Wikipedia

    en.wikipedia.org/wiki/Emotion_classification

    In discrete emotion theory, all humans are thought to have an innate set of basic emotions that are cross-culturally recognizable.These basic emotions are described as "discrete" because they are believed to be distinguishable by an individual's facial expression and biological processes. [1]

  9. Face perception - Wikipedia

    en.wikipedia.org/wiki/Face_perception

    Despite this ability, newborns are not yet aware of the emotional content encoded within facial expressions. [19] Infants can comprehend facial expressions as social cues representing the feelings of other people before they are a year old. Seven-month-old infants show greater negative central components to angry faces that are looking directly ...