1. Behaviourism approaches like those of Pavlov, Skinner, Bandura, and Rotter focus on conditioning and external factors to understand human behaviour.
2. Bandura introduced social learning theory which recognized both internal factors like beliefs and thoughts as well as external factors like rewards and punishments influence behaviour.
3. Rotter developed a model for predicting behaviour based on expectancy, which is the perceived likelihood of reinforcement, and reinforcement value, the importance of the reward to the individual. He also discussed the concept of locus of control which refers to whether people believe outcomes are in or out of their personal control.