Unfortunately not a great experiment.  The first time through I expected to see a &#x27;stop&#x27; 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&#x27;t going to jump out.  When the &#x27;STOP&#x27; flashed on the screen it took me by surprise because I was looking for a stop sign, not for what&#x27;s essentially a pop-up to come out of nowhere.<p>My reaction time was initially scored as &#x27;42 year old&#x27; (I&#x27;m 37).  The next time through it was a 20 year old.  The third time it told me I might not be human.