Quote:
Originally Posted by Mrluvaluva
It can involve any kind of question. It's all to do with heart rate etc.
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heart rate variation, moisture content on skin and in some cases eye movement and speed or tone of answer. My dad had one of those machines but it was invisible because every time he asked me a question i got a clip and told I was lying, never did figure out where he hid the damm thing but it was never wrong.