Last stop: The Human Behavior

On the XIXth,  psychology becames autonomous and recognized as a science. The definition is that psychology shapes the object, that is permeable to the experimentation.

At this century the object of study is the Human Behavior. 

In other words: All the observable acts and reactions, everything we do, from the gestures to words.

Other things that taken into account are the mental processes, emotions, actions, thoughts, mental representations, fantasy and perceptions.