I took a class in college on lie detection technology from someone who worked doing research. Lie detectors don't detect lies or emotions, they measure heart ra

I took a class in college on lie detection technology from someone who worked doing research. Lie detectors don't detect lies or emotions, they measure heart rate, respiration rate, and galvanic skin response, which only tell you when the individual is experiencing something; could be pain, anxiety, fear, anger, happiness, a lot of things. Maybe they are lying, maybe not, not really good enough evidence with those things. Heart rate isn't going to give you as much information, and you aren't in a controlled environment, so I imagine things like exercise could effect it. It can be detected with a camera recording your face and a simple algorithm though, so biometric data from an airport could definitely give you someone's pattern. This laser presumably detects vibrations, so I'd be interested to see if something as simple as listening to music with a bit of base as you walk could effect it.