The goal of the APsiH project is to consider, both from a historical and a critical perspective, the origin and development of the antipsychologistic idea that logic is by its nature separated from psychology and that it cannot be reduced to the latter, nor that psychological research can provide results that are an integral part of the foundations of logic (but also of philosophy as a whole). This idea was very often accompanied by the acceptance of realism about logical content, whereby in many (though not all) cases, antipsychologism implied logical (and mathematical) Platonism. Although throughout the 19th century isolated understandings of logic (e.g. Bernard Bolzano or Gottlob Frege), at the turn of the 20th century, such antipsychologistic conceptions began to dominate logic and philosophy, initiating on the one hand a series of metaphysical, epistemological, and semantic questions within antipsychologistic conceptions themselves (e.g., Edmund Husserl, Bertrand Russell and, somewhat later, Ludwig Wittgenstein), and at the same time encouraging the development of alternative conceptions of logic. What initially developed as a particular standpoint in logic (and mathematics) soon became relevant for other philosophical disciplines, so today, many views in these disciplines (e.g., in the philosophy of language, epistemology, and philosophy of action), although they do not explicitly emphasize their antipsychologistic basis, they rest on precisely such foundations. As part of the project, special attention will be paid to Croatian authors who have been mostly neglected in previous research of Croatian philosophical heritage (such as Albin Nagy) as well as some insufficiently researched ideas of more prominent Croatian philosophers (such as Franjo Marković, Gjuro Arnold and Stjepan Matičević).
This project is conducted at the Institute of Philosophy in Zagreb in the period 2024–2027, reviewed by the Ministry of Science and Education of the Republic of Croatia and financed through the National Recovery and Resilience Plan by the European Union – NextGenerationEU.