Affect refers to the experience of feeling or emotion that a person expresses. It can be seen in how someone reacts to a situation, such as smiling when happy or frowning when sad. Affect is an important part of our daily interactions, as it helps convey our emotional state to others and can influence their feelings as well. In psychology, affect is often studied to understand how emotions impact behavior and decision-making. For example, psychologists may explore how positive affect, like joy, can lead to more creative thinking, while negative affect, such as anger, might result in impulsive actions.