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Arousal is a central concept in the analysis of moods and emotions, regardless of whether these experiences occur in actual social situations or are elicited by veridical or fictional media presentations. Although the conceptualizations of arousal show marked differences, some form of physical excitedness is consistently invoked as the primary determinant of the intensity of emotional experience and behavior. Much research attention has been given to the possibility of manipulating this intensity, especially in the context of media entertainment with its apparent agenda to maximize emotional experience. Theories of sensation seeking address the latent yearning for excessive excitement, especially among emotionally labile adolescents and young adults. Excitation-transfer theory, moreover, deals with the escalation of emotions, in particular with the exploitation of aversive emotions for the intensification of subsequent positive excitement, delight, exuberance, and exultation.

Arousal in Emotions and Moods

Arousal refers to the bodily condition of being roused, literally the experience of “shaking one's feathers.” In nonmetaphoric terms, being roused or aroused manifests itself in heightened overt and covert activity. Such states of acute arousal characterize all vital emotions, and the experience of these states is part of all strong feelings. Arousal is an essential component of pleasure and displeasure, sadness and happiness, love and hate, despair and elation, gaiety and dejection, rage and exultation, exhilaration and grief, frustration and triumph, merriment and fear, anger and joy, and other emotions of high experiential intensity. Although sexual activities are usually not included in the enumeration of emotions, they certainly have their place among acute emotions. The high arousal intensity associated with vital emotions is comparatively short-lived and is strongly focused on both causal circumstances and motivational implications.

Moods are considered affective states that are also associated with elevated arousal. In contrast to emotions, however, moods are characterized by lower arousal intensities that persist for longer periods of time. Additionally, whereas emotions are instigated by apparent causes and, in turn, instigate cause-determined actions, moods lack such focus and are marked by motivational diffuseness instead.

Individual differences in emotionality and moodiness can be pronounced, as can developmental differences. During childhood and adolescence, for instance, the control of impulsive emotions and lingering moods tends to be wanting, mostly because of developmentally lagging anticipatory and judgmental skills.

Conceptions of Arousal and its Function

In earlier theories of motivation and emotion, arousal was treated as a unitary force energizing behavior that receives direction by independent means. Behavior theory likened arousal to an engine that drives, but does not guide, overt actions. The necessary guidance was thought to come from impulses that, at any given time, were dominant in the habit structure, this structure being partly determined by instinct but mostly established through learning. Arousal or drive strength was not directly measured and thus remained a hypothetical construct.

Activation theory similarly construed arousal as the behavior energizer and held some form of cognition accountable for behavior guidance. In contrast to behavior theory, however, activation theory committed itself to measuring arousal strength. It focused on activities in the brainstem reticular formation. Measured in wave patterns and rhythms of the encephalogram, states ranging from coma through sleep, drowsiness, relaxed wakefulness, and alert attentiveness to strong, excited emotions were distinguished and used to map emotional intensity.

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