The James-Lange Theory is a psychological theory that suggests emotions are the result of physiological reactions to events. According to this theory, when we encounter a stimulus, our body responds with specific physical changes, such as increased heart rate or sweating. We then interpret these bodily responses as emotions. For example, if you see a snake, your body might tremble and your heart may race. The James-Lange Theory posits that you feel fear because you notice these physical changes, rather than feeling fear first and then experiencing the physical reactions.