Level 2 demonstrates an annoyance I have with such captachas. It states to select all squares containing a stop sign. It becomes some sort of game theory around what I think other people think a stop sign "is". I would consider all parts of the stop sign, including its metal stand, part of the sign. Other people apparently think only the top bit, the red bit, of the stop sign "is" the stop sign.
If I'm supposed to select all squares "containing a motorcycle", and one square contains just a couple pixels of the edge of it, would other people select that square or not? I would, since it contains pixels of a motorcycle, but apparently, again, most people disagree with me, because I'll get it wrong if I do that.
It just drives me crazy having to choose what I think other people would choose, rather than choosing what I believe is objectively "correct". Maybe you could argue that's part of the test, to know what other humans would choose. But I don't think that was the original intent/design. I'm constantly second guessing myself on these types of captchas, and constantly getting them wrong.
If I'm supposed to select all squares "containing a motorcycle", and one square contains just a couple pixels of the edge of it, would other people select that square or not? I would, since it contains pixels of a motorcycle, but apparently, again, most people disagree with me, because I'll get it wrong if I do that.
It just drives me crazy having to choose what I think other people would choose, rather than choosing what I believe is objectively "correct". Maybe you could argue that's part of the test, to know what other humans would choose. But I don't think that was the original intent/design. I'm constantly second guessing myself on these types of captchas, and constantly getting them wrong.