Fear conditioning is when a stimulus that used to be a neutral stimulus is used to create fear. One main example is the Little Albert experiment by Watson and Rayner. The researchers tested infants' emotional reactions. They found that Little Albert would react to a loud noise and because of that he conditioned that noise to elicit fear when he saw a white rat. This came to be known as 'conditioned emotional response'. After a period of time, Little Albert would cry when he saw a white rat or anything small and white, even his stuffed animal.