Behaviorist theory is based on a stimulus-response theory of psychology, and proposed by behavioral psychologist Skinner. He suggested that language is also a form of behavior. It can be learned the same way as an animal is trained to respond to stimuli. This theory of learning is referred to as behaviorism. One influential result is the audio-lingual method, which involves endless ‘listen and repeat’ drilling activities. The idea of this method is that language is learned by constant repetition and the reinforcement of the teacher. Mistakes were immediately corrected, and correct utterances were immediately praised. This method is still used in many parts of the world today.