Believed only observable behaviour is relevant to psychology. Learning principles one vs. two factor theories. What is learning: learning is a relatively permanent change in behavior which is independent of the effects of maturation and temporary factors such as fatigue or sensory adaptation. Assertion is that one type of learning is predominant. One basic process or principle underlies all forms of learning such as: principle of contiguity. Response in the presence of a particular stimuli leads to learning through the formation of an association. Strongly linked to classical or pavlovian conditioning. However, it is not entirely absent from the operant paradigm which may also be interpreted via contiguity: principle of reinforcement. Contention is that drive reduction is the motivating factor in learning. E. g. , hunger eat reduction of drive to eat. However, an unconditioned stimulus may also be interpreted as setting up a drive reduction situation: two factor. The most notable theorists who have utilized the combination of.