The book presents a wide range of psychodiagnostic techniques (more than 100) aimed at studying mental processes, behavioral, cognitive and emotional-personal spheres of the psyche. During the selection, preference was given to methods that are the result of a generalization of many years of experience in scientific research and their practical application. Psychodiagnostic techniques will help speech therapist distinguish speech disorders by their origin, as well as clarify the mechanisms of psychological disorders existing in a child, teenager or adult.