The article examines the problem of modern classifications used in psychiatry (ICD, DSM) that are devoid of the fundamental scientific base and primarily serve the goals of statistics and epidemiological research. In this context researchers are increasingly interested in the relationship between the two diagnostic approaches: categorical and dimensional. It is noted that each of these approaches has its own advantages and disadvantages. In this context it is proposed to take into consideration while making a diagnosis of schizotypal disorder not only typological (categorical) attributes but also dementia characteristics of the patients mental status, which, in the holistic approach, should be compared with the psychological, social and functional diagnosis.

IntroductionThe relevance of this research is determined by the fact that an important scientific task of the modern clinical classification of mental disorders is the productive combination of the most valuable for the practical use of categorial and dimensional (in terms of the weight and depth of each dimensia) of the characteristics in in a particular clinical picture of a disease.ObjectivesThe goal of the research is to validate the new categorical-dimensional criteria necessary for the verification of schizotypal disorder.MethodsThe information base of the research included medical data on 150 patients with schizotypal disorder. Categorical characteristic used according to the systematics of schizotypal disorder (Kotsiubinskii A.P, 2018) published in the National Guide «Psychiatry», which includes the following syndromes: obsessive-phobic, dysmorphophobic, non-delusional hypochondria, heboid, histrionophoric, impulsive-dysfunctional, schizoaffective, dissociative-disintegrative, autistic, dismotivative, amotivative. Our systematics was used with following demensia: positive, affective, negative, cognitive, disordered behavior, dissociative and coenestesipatic. Guided by the principle of five-level representation of each dimensia (from «0» to «4») in accordance with DSM-V and the informative systematics of dimensia was developed with each of dimensia also has rate from «0» to «4».ResultsThis diagnostic approach made it possible to correlate the categorial and dimensional characteristics, both to each other and to the criteria of the condition of the patients’ state with the prototype of schizotypal disorder (in the range of «1» to «5»).ConclusionsThis has made it possible to more accurately diagnose non-psychotic forms of mental illness, in particular: differentiate schizotypal disorder «sui generis» and schizotypal personality disorder.DisclosureNo significant relationships.