Émotionthumb|upright=1.8|Roue des émotions de Robert Plutchik.|alt= L'émotion est une expérience psychophysiologique complexe et intense (avec un début brutal et une durée relativement brève) de l'état d'esprit d'un individu animal liée à un objet repérable lorsqu'il réagit aux influences biochimiques (internes) et environnementales (externes). Chez les humains, l'émotion inclut fondamentalement « un comportement physiologique, des comportements expressifs et une conscience ».
Emotion classificationEmotion classification, the means by which one may distinguish or contrast one emotion from another, is a contested issue in emotion research and in affective science. Researchers have approached the classification of emotions from one of two fundamental viewpoints: that emotions are discrete and fundamentally different constructs that emotions can be characterized on a dimensional basis in groupings In discrete emotion theory, all humans are thought to have an innate set of basic emotions that are cross-culturally recognizable.
Ennuithumb|right|250px|L'ennui : tableau du peintre et illustrateur français Gaston de La Touche Dans l'usage habituel, l'ennui se présente sous la forme d'un état émotionnel ou psychologique vécu par une personne dont l'occupation quotidienne est dépourvue d’intérêt, voire monotone. Cette sensation, généralement envahissante, souvent liée à une situation de désœuvrement peut quelquefois entraîner un état de détresse émotionnelle, telle que la tristesse.
Émotion (zoologie)vignette|Un dessin d'un chat par T. W. Wood dans le livre de Charles Darwin, The Expression of the Emotions in Man and Animals, décrit comme agissant «dans un état d'esprit affectueux» L'émotion en zoologie désigne les sentiments et émotions subjectifs éprouvés par des animaux non-humains. Les émotions peuvent être décrites comme des états conscients, subjectifs caractérisés premièrement par les expressions psychophysiologiques, les réactions biologiques, et les états mentaux.
Emotion and memoryEmotion can have a powerful effect on humans and animals. Numerous studies have shown that the most vivid autobiographical memories tend to be of emotional events, which are likely to be recalled more often and with more clarity and detail than neutral events. The activity of emotionally enhanced memory retention can be linked to human evolution; during early development, responsive behavior to environmental events would have progressed as a process of trial and error.
Negative affectivityNegative affectivity (NA), or negative affect, is a personality variable that involves the experience of negative emotions and poor self-concept. Negative affectivity subsumes a variety of negative emotions, including anger, contempt, disgust, guilt, fear, and nervousness. Low negative affectivity is characterized by frequent states of calmness and serenity, along with states of confidence, activeness, and great enthusiasm. Individuals differ in negative emotional reactivity.
Concordance inter-jugesIn statistics, inter-rater reliability (also called by various similar names, such as inter-rater agreement, inter-rater concordance, inter-observer reliability, inter-coder reliability, and so on) is the degree of agreement among independent observers who rate, code, or assess the same phenomenon. Assessment tools that rely on ratings must exhibit good inter-rater reliability, otherwise they are not valid tests. There are a number of statistics that can be used to determine inter-rater reliability.
Emotions and cultureAccording to some theories, emotions are universal phenomena, albeit affected by culture. Emotions are "internal phenomena that can, but do not always, make themselves observable through expression and behavior". While some emotions are universal and are experienced in similar ways as a reaction to similar events across all cultures, other emotions show considerable cultural differences in their antecedent events, the way they are experienced, the reactions they provoke and the way they are perceived by the surrounding society.
Emotion recognitionEmotion recognition is the process of identifying human emotion. People vary widely in their accuracy at recognizing the emotions of others. Use of technology to help people with emotion recognition is a relatively nascent research area. Generally, the technology works best if it uses multiple modalities in context. To date, the most work has been conducted on automating the recognition of facial expressions from video, spoken expressions from audio, written expressions from text, and physiology as measured by wearables.
Discrete emotion theoryDiscrete emotion theory is the claim that there is a small number of core emotions. For example, Silvan Tomkins (1962, 1963) concluded that there are nine basic affects which correspond with what we come to know as emotions: interest, enjoyment, surprise, distress, fear, anger, shame, dissmell (reaction to bad smell) and disgust. More recently, Carroll Izard at the University of Delaware factor analytically delineated 12 discrete emotions labeled: Interest, Joy, Surprise, Sadness, Anger, Disgust, Contempt, Self-Hostility, Fear, Shame, Shyness, and Guilt (as measured via his Differential Emotions Scale or DES-IV).