lie detector

An electronic multispectral recorder with strong anti-interference ability consists of a sensor, an amplifier, a filter and an electromagnetic induction pen. It can be called the third generation polygraph. In 1970s, Dektor Anti-Spy Intelligence and Security Company in Virginia, USA, designed a so-called brand-new fourth-generation lie detector, which can analyze infrasound waves. But in recent years, there are different views on this technology, and there are disputes and different opinions in theory. Therefore, in practice, multispectral recorders are widely used.

Although the polygraph has been updated for several generations in the last hundred years, it has made great progress. As a general technology, polygraph technology has been widely used in national defense, justice, insurance, business and even enterprise recruitment in more than 50 countries around the world. According to statistics, from 1990 to 199 1, Romania detected 1833 cases with the accuracy rate of 95%. Statistics from Japan show that the accuracy of polygraph is 86%. In the United States, polygraph technology was first widely used in police departments, security departments and private detectives, and then gradually extended to regularly take polygraph tests for federal government employees and military insiders. In the 1970s, it became more socialized, and was also used by institutions and enterprises to recruit employees, regularly evaluate employees and solve internal theft cases. The association has also set up a professional polygraph company and a polygraph office. This has also caused some "unjust, false and wrong cases" and aroused strong protests from AFL (trade unions) in the United States. 1988 stipulates that it is forbidden to use polygraph in private companies, except for companies that have signed contracts with the state to undertake important national defense secrets. In the United States, on the one hand, the legal profession recognizes the scientific nature of polygraph and allows the results of polygraph to be submitted to the court as evidence; On the other hand, its application is strictly restricted, and it is stipulated that only professionals with higher education and special training are qualified to take the polygraph. Now, the polygraph has become a common equipment in foreign police organs. The United States, Canada, Japan, Turkey, South Korea, Israel, Russia, Poland and other countries use polygraph technology more. In addition, 3050 countries are studying "polygraph" technology. Romania's "polygraph" has been approved by the judicial department as a legal means to provide evidence. "Lie detection" has been included in the routine procedure of criminal investigation by foreign police organs, and there is a section on "Lie detection" in the published Handbook of Court Psychology, Handbook of Criminal and Civil Investigation and Handbook of Criminal Evidence Investigation. Today, 35 states in the United States allow polygraph results to be used as auxiliary evidence in court, but the results must strictly meet the requirements of American evidence law.