What does traditional behaviorism advocate to pay attention to and study?

This is an observable and measurable explicit behavior.

Behaviorism school thinks that psychology is a science, which can only be studied by objective methods, and can't explore people's subjective world. Traditional behaviorism mainly includes classical conditioned reflex theory, operational conditioned reflex theory and social learning theory. One of the similarities of these three theories is to study how to change the behavior of the subject by controlling the environment. Therefore, traditional behaviorism mainly focuses on observable and measurable explicit behavior.