Though the judicial system has been at loggerheads with the police with the credibility of lie detectors, the U.S army is putting the lie detectors to it’s most stringent test by inducting handheld versions which they call PCASS. PCASS, an acronym for Preliminary Credibility Assessment Screening System is made by the Lafayette Information Systems and uses an algorithm developed at the Advanced Physics labs at the John Hopkins University. The PCASS uses three electrodes/leads that measure blood pressure, cardiological activity and electrochemical property of the skin. With these three inputs, the PCASS will display three lights green, red and yellow. Green means the truth, red means a lie and yellow means that the PCASS cannot decide whether the accused is saying the truth or lying. To use the PCASS, the user will have to make an interpreter ask a set of twenty questions in Arabic, Pashto or Persian and then type the accused’s answers into the system.
All this was to happen with the three leads being fixed onto the accused. After the question answer session, the PCASS will display one of the three results. Although, many experts are questioning the veracity of this device, the U.S army says that it will help the troops nail down possible suicide bombers and other terrorists. As to how effective the PCASS really is, only time will tell. For now, watch this video of the PCASS in action.
Via: MSNBC
