Valence (psychology)

Overview
'Valence', as used in psychology, especially in discussing emotions, means the intrinsic attractiveness (positive valence) or aversiveness (negative valence) of an event, object, or situation. However, the term is also used to characterize and categorize specific emotions. For example, the emotions popularly referred to as "negative", such as anger and fear, have "negative valence". Joy has "positive valence". Positively valenced emotions are evoked by positively valenced events, objects, or situations. The term is also used about the hedonic tone of feelings, affect, certain behaviors (for example, approach and avoidance), goal-attainment or -non-attainment, and conformity with or violation of norms. Ambivalence can be viewed as conflict between positive and negative valence-carriers.

History of Usage
The term entered English usage in psychology with the translation from German in 1935 of works of Kurt Lewin. Ambivalence has a longer history.

Criterion for Emotion
Valence is one criterion used in some definitions of emotion. The possible absence of valence is cited as a reason to exclude surprise, viewed as the startle reaction, from the list of emotions, though some would include it.

Measurement
Valence could be assigned a number and treated as if it were measured, but the validity of a measurement based on a subjective report is questionable. Measurement based on observations of facial expressions, using FACS, and microexpressions (See Ekman.) or on modern functional brain imaging may overcome this objection.