The anthology presents texts by famous forensic psychiatrists and psychologists devoted to the problem of determining the affect of the accused in the practice of forensic examination. The history of the formation of the criminally relevant concept of affect is covered. The ideas about affect in general psychology are presented. Modern forensic psychological expert criteria for diagnosing affect in the accused are outlined. Examples of complex forensic psychological and psychiatric examinations are given, devoted to the characteristics of affect in minors, the differential diagnosis of normal affects with pathological affects, with “limited sanity”. For forensic psychiatric and forensic psychological experts, law enforcement officers, as well as students, graduate students, teachers psychological and law universities and faculties.