Behaviorism (English behavior — behavior) in a broad sense — a direction in psychology that studies the behavior of humans and animals as objectively observed reactions of the body to environmental stimuli.
Neobehaviorism, in addition to the study of externally observed behavior, recognizes «intermediate variables» — internal factors of the body that serve as an intermediary link between the impact of stimuli and response muscle movements.
The most famous representatives: Edward Chase Tolman, Burres Frederick Skinner, C. L. Hull.