It's still not far off. My dad had a pretty severe lazy eye, and I have no doubt eye tracking software would think that he was looking down at his desk constan

It's still not far off. My dad had a pretty severe lazy eye, and I have no doubt eye tracking software would think that he was looking down at his desk constantly. I stare off into the distance (usually sideways) when I'm thinking. Those sorts of things are common and barely conscious. So, what's left for the AI? Trying to detect if people seem nervous? Well, I've got friends who have nervous twitches under normal conditions. What is normal behavior varies wildly person-to-person. Trying to figure out "is someone glancing somewhere before answering" vs "does someone nod to themselves when they think they got an answer in their head" doesn't sound like something AI can do. Figuring out "is this person cheating" from a recording of their face sounds pretty close to phrenology. Determining personality from skull-size, determining cheating from facial-motion... they both sound bogus, and like someone's trying to create a correlation that cannot account for the variety of human behaviors and shapes.