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- Optimal performance is a function of task difficulty and level of arousal.

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Stanley Schachter and Jerome Singer proposed yet another theory called the Two-Factor Theory. Here it is suggested that our physiology and cognitions create emotions. Emotions have two factors-physical arousal and cognitive label

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Sight of oncoming car (perception of stimulus)

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Sight of oncoming car (perception of stimulus)

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Walter Cannon and Phillip Bard Proposed that an emotion-triggering stimulus and the body's arousal take place simultaneously

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sight of oncoming car (perception of stimulus)

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sight of oncoming car (perception of stimulus)

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William James and Carl Lange proposed that the physiological activity precedes the emotional experience

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A subfield of psychology that provides psychology’s contribution to behavioral medicine. (p. 397)

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An interdisciplinary field that integrates behavioral and medical knowledge and applies that knowledge to health and disease. (p. 397)

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The perception that we are worse off relative to those with whom we compare ourselves. (p. 394

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Our tendency to form judgments (of sounds, of lights, of income) relative to a neutral level defined by our prior experience. (p. 394)

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Self-perceived happiness or satisfaction with life. Used along with measures of objective well-being (for example, physical and economic indicators) to evaluate people’s quality of life. (p. 390)

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People’s tendency to be helpful when already in a good mood. (p. 390)

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Emotional release. The catharsis hypothesis maintains that “releasing” aggressive energy (through action or fantasy) relieves aggressive urges. (p. 388)

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The effect of facial expressions on experienced emotions, as when a facial expression of anger or happiness intensifies feelings of anger or happiness. (p. 383)

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A machine, commonly used in attempts to detect lies, that measures several of the physiological responses accompanying emotion (such as perspiration and cardiovascular and breathing changes).

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The Schachter-Singer theory that to experience emotion one must (1) be physically aroused and (2) cognitively label the arousal. (p. 367)

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The theory that our experience of emotion is our awareness of our physiological responses to emotion-arousing stimuli. (p. 367)

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A response of the whole organism, involving (1) physiological arousal, (2) expressive behaviors, and (3) conscious experience. (p. 366)