The course "Special Psychology" is obligatory in the training of future specialists in the field of special psychopedagogy and inclusive education and is recognized, to form ideas about the theoretical and methodological foundations of this science, e? basic categories. The main content of special psychology is the concept of the essence of phenomena of disturbed development, the mechanisms of their formation and the general laws of dysontogenesis. The idea of ​ ​ the nature of disturbed development makes it possible to reveal the subject content of this science.