The subject of analyses undertaken in the book are concepts of the post-Kantian philosophers who, in their inquiries, referred to psychology, namely: Jakob Friedrich Fries, Friedrich Eduard Beneke, Johann Friedrich Herbart, Jürgen Bona Meyer, and Leonard Nelson. What is revealed in the course of the author’s investigations is the following. First of all, attempts to establish relationship between psychology and philosophy are not identical with the subsequent endeavours to found philosophy on a bedrock of psychology. Such an understanding of relations between the two has come to be known as psychologism, and does not refer to the concepts in question. Second of all, one cannot propose a single model of understanding the relation occurring between philosophy and psychology. As a source of the problem here one can indicate the interpretation of Kant’s thought put forward by Fries. The latter - to a lesser or greater degree - is referred to by the remaining thinkers. Thirdly, the author’s analyses demonstrate such a plethora of standpoints regarding the titular issue that the only common denominator may be broadly understood psychology
