The book includes the theoretical foundations of psychodiagnostics, counseling and training psychocorrection, and the theory in it is closely related to practice. Recommendations are given on the use of specific theoretical material in the work (what type of client is shown to work in one direction or another), the process of psychocorrection in line with each direction is described step by step, the methods and techniques by which the desired changes in the client are achieved, examples of practice are described. The methods and tests used by practicing psychologists have been placed, recommendations have been made for drawing up an opinion on psychological testing.