Final answer:
Behaviorists believe that human behavior is shaped by external factors and can be explained through learning and conditioning.
Step-by-step explanation:
Behaviorists believe that human behaviors are influenced by the environment, and that all behaviors, including thoughts and feelings, can be explained by external factors. They reject the idea of inborn personality traits and view behavior as a result of prior learning and conditioning. Behaviorists, such as B.F. Skinner, emphasize the role of reinforcement and consequences in shaping behavior patterns.