Final answer:
Believing that smiling can make someone feel happier aligns with the facial feedback hypothesis, which posits that facial expressions can influence emotional experiences.
Step-by-step explanation:
If you suggest that smiling can make someone feel happier, then you believe in the facial feedback hypothesis. This concept was developed from the understanding that one's facial expressions can affect their emotional experiences. Research such as Soussignan (2002) supports this hypothesis by showing that the intensity of one's smile can influence their emotional reaction and physiological arousal. In contrast, the James-Lange theory of emotion suggests that emotions arise as a result of physiological arousal, for example, fear would be the result of experiencing physical changes like a racing heart upon seeing a snake.
Other theories such as the Cannon-Bard theory and Schachter-Singer two-factor theory offer different takes on the process of emotional experience. In comparison to these theories, the facial feedback hypothesis emphasizes that the act of smiling itself can lead to feelings of happiness, thus potentially boosting one's mood through deliberate facial action.