Study On Polygraph Opinions Credibility And Probative Force Of Evidence

Ability of polygraph evidence and opinions of proof issue has been a high concern,but scholars debated topic. Polygraph as a negative opinion from the use of polygraph evidence scholars disagree have evidence of basic attributes, accuracy of polygraph opinion is not high enough, scientific and other questionable polygraph technology point of view to deny polygraph can be used as evidence in court. In this paper,polygraph academic views viewpoints questioned comments made polygraph can be used as evidence point of view. From the scientific, the polygraph technology already has a mature psychological, physiological basis; from the accuracy of polygraph opinion, the accuracy of the polygraph with the support of modern technology, the problem is not worth worrying about, and 100% accurate evidence does not exist, as long as achieve a high degree of probability it can not completely deny the evidence of their value; and polygraph theoretical basis of scientific advice polygraph objectivity,and relevance and reliability of the case so indicate polygraph evidence characteristic views. Therefore polygraph opinion is widely used in practice, relevant evidence characteristic ability. And with improved efficiency of criminal procedure, the promotion of substantive criminal justice and procedural fairness of these positive value, so the advice given polygraph legitimacy to admit polygraph evidence of the ability to have opinions. Finally, the probative force of the polygraph observations were described, analyzed the probative force of criminal suspects and defendants,victims, witnesses these three polygraph opinion. Of course, the views of the polygraph is not "scientific judgment" and can not be directly used to prove the facts of the crime of criminal suspects and defendants, it must be confirmed with other evidence, to form a complete chain of evidence, a reasonable rule out contradictions, so the polygraph comments We should adopt rules finite. Then the factors affecting the probative force of the polygraph comments were analyzed and the corresponding proposed preventive measures.