Answer:
Behaviorism
Step-by-step explanation:
In psychology, behaviorism is one school of psychology that focused in the observable aspects of the persons rather than in the ideas, feelings and emotions people experience.
The founder of behaviorism was John B. Watson and his goal was to make psychology an objective science and he thought that the way to achieve this goal was to make it focus only in what could be observable rather than in inner processes.
Therefore, behaviorism is a school of psychology that restricts the study of human nature to what can be observed rather than to states of consciousness.