My guess is they're trying to classify behaviors like glancing off in some direction repeatedly to look at a cheat sheet or a phone, the same things human proct

My guess is they're trying to classify behaviors like glancing off in some direction repeatedly to look at a cheat sheet or a phone, the same things human proctors watch for. Presumably the system can fail to accurately estimate the gaze direction for some people because they are too different from the design assumptions made. i don't really think that's the same as phrenology. It's more akin to BMI being a poor estimate of obesity for bodybuilders.