The aim of the study is to establish and develop criteria for differential diagnosis and nosological qualification of the obsessive-compulsive spectrum semiotics in children with schizoform, neurotic and emotional-behavioral disorders.

Contingents and methods. 100 children were examined and divided into 3 groups according to their nosological affiliation. Group 1 (G1) included 40 children with schizoform disorders. Group 2 (G2) consisted of 30 children with neurotic spectrum disorders. Group 3 (G3) included 30 children with emotional-behavioral disorders of childhood. All patients were examined using psychoanamnestic, clinical-psychopathological (with auxiliary clinical-ethological method) and pathopsychological methods.

Based on the results of psychoanamnestic, clinical-psychopathological, clinical-ethological and pathopsychological research of children with schizoform, neurotic and emotional-behavioral disorders, four main and one additional criteria for differential diagnosis and relevance of the nosological qualification of the obsessive-compulsive spectrum semiotics in children with schizoform, neurotic and emotional-behavioral disorders were formed: a specific cluster of qualitative thematic characteristics, a typology of obsessional themes, a specific cluster of structural-dynamic characteristics, clinical arrangement options and a specific constellation of subjectively felt and objectively observed anxiety manifestations.

These criteria provide the basis for the development of the “Scale for Differential Diagnosis and Relevance of the Nosological Qualification of the Obsessive-Compulsive Spectrum Semiotics”. It is assumed that the scale will consist of three modules: a three-stage thematic module, a threecomponent structural-dynamic module and a nosospecific module of clinical arrangement.