J.B. Watson conducted an experiment on Little Albert to demonstrate that emotions can be learned through classical conditioning. Initially, Little Albert was not afraid of a white mouse but after repeatedly pairing the mouse with a loud startling sound, he learned to fear the mouse and other similar furry stimuli. This showed that a neutral stimulus (mouse) could become a conditioned stimulus that elicits a conditioned response of fear through association with an unconditioned stimulus (loud sound) that naturally provokes an emotion. Watson's theory suggested that all behaviors are learned through conditioning and positive behaviors can be taught using rewards as stimuli while avoiding punishments that cause negative effects.