If you hadn’t heard, polygraph tests (so-called “lie-detector tests”) are not very reliable. While they still have their defenders, many courts won’t except the results as evidence. A polygraph can’t tell if you’re lying; it can only tell if you’re nervous. But...
polygraph tests
Many cops believe they can use this tool to test people for lying
Scientifically, it's a pipe dream. It would be convenient if we could train law enforcement officers on how to tell if people are lying, but so far there is no way to do so. That doesn't stop people from trying, though.We've discussed lie detector tests before. In...
Lie-detector tests are unscientific, produce faulty evidence
Polygraph tests, often called "lie-detector tests," are not admissible as evidence in the courts. This is because they have never been shown to produce reliable proof of whether the subject is lying.Nevertheless, they continue to be popular as an employment screening...