UFS211 - Task 9

Lie detector is can works by voice analysis and which can be used without a subject's knowledge. The Dektor psychological stress analyser (PSE) is used by private industry for pre - employment screening, interviews, investigating thefts, and even periodic staff checks. Dektor claims that the muscle tightening occurs very quickly, and can change from one word to the next, so that it is possible to pick out a word that caused stress. In additions, US insurance investigators are use the PSE. They just need tape record the interview. But the most serious problem is that primary application will be in situations where people may not object - such as pre - employment interviews. And, the PSE can used without the subject even knowing; its inventors analysed the televised Watergate hearings and told the press who they thought was lying. Finally, the device is not foolproof but depends on the skill of the investigator, who receive only a one - week course from Dektor.