Aren?t all of these cases over 35 years old? Don?t you think that the technology connected to polygraphs has, like all technology, advanced in those years?
Would the government trust them to track the offending of domestic and child abusers if their accuracy hadn?t improved?
They had nothing McCanns offered to take a polygraph nearly 20 years ago, perhaps polygraph tests are more accurate now but that?s not the impression I get from the recent articles I?ve read. I think the government use of polygraphs in known abusers is a slightly different kettle of fish as these are KNOWN abusers, and therefore there is little likelihood of innocent people being put into prison off the back of these tests. Also QUOTE the Government has published analyses that show that criminals give more admissions about breaches of their licence terms when the polygraph is used - regardless of whether the test is ?really? uncovering whether they?re lying from their physiology. But all this shows it that the examiner has managed to dupe the subject into thinking the test can read their mind, and they duly fess up more often? END QUOTE
But you may be right - they may be virtuslly 100% accurate now in which case why are we even bothering with trials? Just make every suspect take a rest and if they fail, just bang em up. Think of the time and money that would save!
https://www.sciencefictions.org/p/polygraph