Scientific Journal of the National Academy of Internal Affairs

The purpose of the study – is to highlight the issue of special knowledge in the newly formed interdisciplinary science of polygraphy with an emphasis on their features. Methodology. The methodological tools are chosen taking into account the goal, the specifics of the object and subject of research. It is a general dialectical method of scientific knowledge of real phenomena, as well as their connection with the theory and practice of applying special knowledge in the field of polygraph. Also special research methods, namely: the method of system analysis, comparative law, systemstructural and forecasting method. Scientific novelty. For the first time among domestic and foreign researchers the scientific opinion concerning special knowledge in the field of polygraph is substantiated. Their content and features are revealed. Emphasis is placed on the problematic issues that currently exist in polygraph activities and slow down the full process of entry of this field of knowledge into public relations. Conclusions. The scientific position is substantiated that polygraphology is practically a new, fully formed branch of knowledge, which, accumulating the achievements of a number of other sciences, builds its own vision on the issue of special knowledge. They can be defined as specific, possessed by a limited number of specialists in this field and are not publicly available and well-known to most entities that use such results. It is proved that a polygraph examiner can demonstrate special knowledge when he is involved in specific research in a particular field or field of activity and, usually, during psychophysiological examinations using a polygraph, and in particular in criminal proceedings. As for the problematic issues of this field and their solution, they relate to the inconsistency of the conceptual apparatus, the lack of unification of methods of polygraph research, the lack of common approaches in drawing conclusions, etc., which ultimately introduces an imbalance in relation to the polygraph and research. application, including the formation of special knowledge in this field