James-lange: emotion follows physical reaction.
Canon-bard: The emotion and physical reaction are simultaneous. Two factor: A mix, requires physical arousal and a cognitive label.
Some of our emotions involve no thinking.
Lazzarus agreed somewhat, but said that most emotions require thinking.
performance on difficult tasks is greatest with low arousal, easy, highest, on high arousal.
React more if: no effects
Sympathetic nervous system: causes arousal Parasympathetic: lowers arousal
General Adaptation Syndrome: response to stress: three steps: alarm, resistance, exhaustion.