The Schachter-Singer two-factor theory takes into account physiological arousal and:

1. The name two-factor points to what the theory combines. 2. The Schachter-Singer two-factor theory is another variation on theories of emotions. 3. It takes into account both physiological arousal and the emotional experience. 4. In contrast to the Schachter-Singer model, appraisal theory puts appraisal before a cognitive label. 5. So the two factors are arousal and the experience itself. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 10 'Emotion and Motivation', sections 10.1-10.4_