The article examines the problem of ambiguity in the use of the polygraph, examples of the introduction of polygraphs are given. The author distinguishes an individual static emotional experience that is the psychological states that personality experiences during polygraph examinations such as lies, deceit, mood, joy, anxiety, fear, excitement, calm. It is emphasized on the presence of the necessary condition - the ability of a polygraph specialist to penetrate the psychological state of the subject. Attention is drawn to the fact that an experienced polygraph examiner is able to compose the psychological image of the subject before the study, because of the contradiction in the views on the evidence base obtained by polygraph examinations, the author recommends using a combined method of obtaining true information. The attention is paid to the training of a polygraph specialist. He must have knowledge of philosophy, psychology, law, anatomy, mathematics and physics. Attention is drawn to the conditions created by polygraph specialists during the study, it is noted that the atmosphere of isolation for the subject is undesirable. The author agrees with separate statements about the fact that the subject should not be distracted by superfluous sounds, to answer the questions that are transmitted by the researcher, but is convinced that too hermetic conditions affect the result of the study, it is recommended to create normal living environment conditions. The further prospect of research in creating a system of psychological views on the problems of predicting lack of honesty through the assumption of future delinquent behavior through the indicators of personal deviance, as a sociopathic personality and psychopathic deviation is seen.