Unfortunately not a great experiment. The first time through I expected to see a 'stop' sign, so I was doing what I do when I drive, scanning the road, looking

Unfortunately not a great experiment. The first time through I expected to see a 'stop' sign, so I was doing what I do when I drive, scanning the road, looking at signs, making sure the deer on the sides aren't going to jump out. When the 'STOP' flashed on the screen it took me by surprise because I was looking for a stop sign, not for what's essentially a pop-up to come out of nowhere. My reaction time was initially scored as '42 year old' (I'm 37). The next time through it was a 20 year old. The third time it told me I might not be human.