Streszczenie
The aim of this article is to present lectures of psychology which took place at the Main School (as a part of the course of logic) and to demonstrate influence they had on positivists worldview. The author analyzes lectures and publications of professors (especially Henryk Struve, but also Wiktor Feliks Szokalski and Kazimierz Kaszewski). Although their works still refered to the Hegelian philosophy and Polish idealism, professors were interested in modern science which uses experience and observation. As the author proves on the basis of works of Julian Ochorowicz, (Henryk Struve’s student) it turns out that young positivists may be seen as students who were developing and continuing their professors ideas