Instinct: a complex, unlearned behavior that is rigidly patterned throughout a species

James-Lange Theory: our experience of emotion is our awareness of the physiological responses

Cannon-Bard Theory: emotion arousing stimulus simultaneously triggers: physiological responses and the subjective experience of emotion

Two-Factor Theory: the Singer-Schacter theory that to experience emotion one must be physically and cognitively label the arousal

Facial Feedback Effect: the tendency of facial muscle states to trigger corresponding feelings such as fear, anger, or happiness

Selye's General Adaptation Syndrome: Homeostasis, Alarm Stage, Resistance Stage, Exhaustion Stage

Drive-Reduction Theory: the idea that a physiological need creates an aroused tension state that motivates an organism to satisfy the need

Homeostasis: tendency to maintain balancer constant internal state

Incentive: a positive or negative environmental stimulus that motivates behavior

Yerkes-Dodson Law: the principle that performance increases with arousal only up to a point, beyond which performance decreases