Called a lie detector test, refers to the specialized technical personnel in accordance with certain rules, the use of polygraph lie detector device records the object in answering the question they _set_ the course of some physiological parameters change, and polygraph device by analyzing the recorded the map, the object being polygraph in answering questions about whether the judge's activities lie. Polygraph device is basically divided into two types, one is the language analyzer, a psychological test for the multi-parameter instrument. Polygraph examination results, known as the "polygraph evidence" refers to a lie detector test by the evidence obtained data, it is not the type of evidence of China's Criminal Procedure Law provides one.
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Polygraph examination and its results in the surveillance application
Polygraph examination and the results of many capacitive and the results of polygraph examination can use in the field of criminal justice, actually involves two questions: First, the technology and reliability of the results (or the accuracy). On this issue, it should be said, as a lie detector test their progress, trust in it is growing. Second, the values of a country's acceptance of the technology. In this issue, different countries based on their own value judgments, their choice is different. In China, according to the National Security Act and the Police Act, national security, public security organs due to the need for crime investigation, technical surveillance measures can be taken (Article X of the National Security Act, Police Act, article 16). From the provision itself, technological surveillance measures can be understood to include polygraph examination. Litigation practice, has also been a lie detector test and the use of polygraph evidence. Have information that the practice of criminal investigation in China, part of the public security organs in the 1980s began using polygraph assist investigators; some people's court in 1994 on the establishment of a polygraph room; April 1998, a city Intermediate People's Court with drug trafficking cases in the trial, the use of polygraph on the four defendants had a "lie test", test results for the identification of evidence to provide a reference case. From the reports of the situation, both for the accuracy and reliability of polygraph examination, or the value of its choice, litigation practitioners are fully affirmed. In academia, though some scholars have raised objections to the polygraph examination, but they also believe that a lie detector test itself is neither good or bad, the key is how to use. Overall, in our country, polygraph evidence in criminal proceedings to use the key, not value judgments, but how to regulate them, how to ensure their accuracy problems.
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Whether polygraph results as evidence
The use of polygraph results as evidence of polygraph results could, in accordance with national law of evidence to confirm their ability to pay. Make a difference with guilt, innocence if the polygraph results as evidence, but through hard work, but not collected in the case of sufficient proof of guilt, the failure to collect other evidence of guilt in the case, you can only make innocent identified. Because the polygraph results, and whether in the real case it should be, even if the polygraph results of the error, because there is not enough evidence of guilt, the burden of proof and standard of proof in accordance with the legal theory and law, can only be found not guilty. As a lie detector test already used in practice, the authorities should as soon as possible for the organization and implementation of the polygraph examination, polygraph personnel qualifications, the conditions for the implementation of a lie detector test, polygraph examination results to determine other requirements for standardized testing examination and the results of the use of lie.