> Over the period of the following 6 months, text captchas appeared to be gradually “phased out”, with the image captcha now being the default type returned, as these captchas are harder for humans to solve despite being solvable by bots [3, 4].
This is so true. When I first go an image captcha, it took me 3 minutes to learn how to solve it. I had JavaScript disabled so I did not realize I had to do 3 pages to complete the challenge (after two, I reloaded and got a new route thanks to tor the page since I though i message up). Also I'm not sure what to click when there is a partial match, is that still a match? And don't even get me started with solving signs (in my first challenge I had to tell apart different kind of signs that were in the image). Is a no trespassing sign still a traffic sign? What about if it is a sign but I don't know which kind of sign (due to domain knowledge – especially when they're foreign signs).
Another problem is that they require you to understand the language the challenge is in. You can still solve a text captcha if you don't speak any English.
This is so true. When I first go an image captcha, it took me 3 minutes to learn how to solve it. I had JavaScript disabled so I did not realize I had to do 3 pages to complete the challenge (after two, I reloaded and got a new route thanks to tor the page since I though i message up). Also I'm not sure what to click when there is a partial match, is that still a match? And don't even get me started with solving signs (in my first challenge I had to tell apart different kind of signs that were in the image). Is a no trespassing sign still a traffic sign? What about if it is a sign but I don't know which kind of sign (due to domain knowledge – especially when they're foreign signs). Another problem is that they require you to understand the language the challenge is in. You can still solve a text captcha if you don't speak any English.
I wish there was a way to force text captchas