It seems that most text labels for SPAM-filtering tests use phrases like “prove you’re not a robot” or “prove you’re a human”. But do non-technical users understand that non-humans can access the Internet? And if not, wouldn’t the term “robot” more likely conjure up images of B-9 from Lost In Space, Asimo, or Terminators, rather than a bodyless web crawler?
I imagine this knowledge gap, if it exists, would be shrinking over time: by 2015 CAPTCHAs have had their heyday already, robotic assistants like Siri are a part of everyday life, and most people with e-mail accounts or open blog comments have likely experienced gibberish text advertisements. But I still wonder if asking a user to prove their humanity ever comes across as strange or unexpected in the context of submitting a form. Does it assume too much insider knowledge? Or does the very act of asking the question alert uninformed users to the existence of robots on the Internet?
Any data on this?