Arousal

The intensity dimension of an emotion — how activated, alert, or energized the person is, independent of whether the feeling is positive or negative.

Arousal measures physiological and emotional activation on a low-to-high axis. Boredom and calm sit at the low end; excitement, anger, and panic sit at the high end.

Combined with valence, arousal forms the two-dimensional circumplex model of emotion used widely in modern affective computing. Tracking arousal alongside valence lets coaches, clinicians, and trainers detect overload, disengagement, or stress that a single emotion label would miss.

Related terms: valence, emotion ai

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