ИСТИНА

The primary aim of this research is to show the high efficacy of the psychological syndrome analysis (Vygotsky-Luria School) for solving issues in the field of psychodiagnostics and psy-chotherapy within the framework of postnonclassical methodology. In our opinion, the syndrome approach applied in theoretical and practical fields of clinical psychology is highly efficient at the current state of the evolution of science due to the potentinal of the new methodological context of the postnonclassical model of rationality and completeness of cultural-historical theory proposed by L.S. Vygotsky concerning the person and its mind as a self-developing open systems. The main method of this study was psychological syndrome analysis (Vygotsky-Luria school).Techniques for the qualitative and statistical data analysis of clinical-and-psychological follow-up study (conducted for 15 years) were used. We examined 290 patients with mitral valve prolapse (MVP) and 73 healthy individuals. The results suggest that the syndrome is system-defined and has a multilevel structure. That is, the structure of the psychosomatic syndrome is determined by three factors, different from the neuropsychological syndrome, which is typically one-factorial. These factors are as follows: a motivational factor (chacterized by the domination of the failure-avoidance motive and the unsatisifed need for self-approval); a disorder of emotion regulation factor; and a psychophysiological factor. We suggest that a psychosomatic syndrome analysis can be used for diagnostic and even prognostic tasks both in clinical psychology and medicine. Keywords: Postnonclassical methodology, Ppsychological syndrome analysis, Vygotsky-Luria school, Psychosomatic syndrome, Mitral valve prolapse (MVP).