You have to be afraid, or at least that's what the James-Lange theory says. The James-Lange theory was officially developed in 1922 by the two men. First, William James, in 1890, came to the conclusion that bodily reactions constitute the basis for the experience of emotions. Carl Lange came to the same conclusion around the same time and their individual theories were combined. The basis of their theory explains how bodily reactions and emotions coincide with each other. When being chased by a bear, it makes sense to feel afraid and have a racing heart, but this physiological response can also indicate anger or physical exhaustion. According to James, the theory is common sense, which it appears to be at first glance, but psychologists disagree and deny the theory. Psychologists who disagree say the James-Lange theory of emotion is backwards: you don't do something then feel a feeling, but you feel an emotion then act on that feeling . After much disagreement, a new theory was created, the Cannon-Bard Theory of Emotion. At the time, the theory seemed accurate and was widely accepted, but soon after it was disproven and rejected among people.