Variable interval reinforcement - reinforcement is given after random amounts of time have passed. In animal studies, Skinner found that continuous reinforcement in the early stages of training seems to increase the rate of learning. Later, intermittent reinforcement keeps the response going longer and slows extinction. Skinner specifically addressed the applications of behaviourism and operant conditioning to educational practice. He believed that the goal of education was to train learners in survival skills for self and society. The role of the teacher was to reinforce behaviours that contributed to survival skills, and extinguish behaviours that did not. Behaviourist views have shaped much of contemporary education in children and adult learning.