Objective psychology. Academician V. Bekhterev. Issue I. St. Petersburg. 1907 year

The author begins his work with the words that the psychology that he will expound bears little resemblance to the psychology that has been the subject of study until now. In objective psychology, there should be no place for questions about subjective processes or processes of consciousness, therefore there should be no place for introspection. Self-observation is not enough even to study one's own mental life. Objective psychology has in mind to study and explain only the relationship of a living creature to the surrounding conditions that affect it in one way or another, without aiming to find out those internal or subjective experiences, which are known as conscious phenomena and which are accessible only to self-observation. All mental items should only be subject to objective registration and control.