Final answer:
John B. Watson argued that psychologists should abandon the study of consciousness and focus on observable behavior instead, which is known as behaviorism.
Step-by-step explanation:
John B. Watson argued that psychologists should abandon the study of consciousness. He believed that the objective analysis of the mind was impossible and preferred to focus on observable behavior instead. Watson's approach, known as behaviorism, emphasized studying learned behavior and its interaction with innate qualities of organisms. This approach involved using animals in experiments and applying the findings to human behavior to some extent.