The facial feedback hypothesis proposes that your facial expression can affect your:

1. The hypothesis reverses the usual direction of cause. 2. Emotion is usually thought to produce a facial expression. 3. The facial feedback hypothesis proposes the reverse can also happen. 4. It proposes that your facial expression can actually affect your emotional experience. 5. Holding a smile can therefore change how you feel. _Source: OpenStax Psychology 2e (CC BY 4.0), Ch 10 'Emotion and Motivation', sections 10.1-10.4_