Re: [Wikitech-l] Captcha for non-English speakers II

-- ~Daniel Friesen (Dantman, Nadir-Seen-Fire) [http://daniel.friesen.name] On Mon, 30 Jul 2012 06:28:13 -0700, Pau Giner pginer@wikimedia.org wrote: > From the UX perspective, a captcha is always an obstacle for the > interaction flow. > Reducing the complexity of user interaction when solving the captcha can > benefit all kinds of users but also solve problems for non-English > speakers. > > Checkbox and honeypot-based captchas avoid most of the problems of > text-based captchas since interaction is simplified to the minimum for > the > user: > http://uxmovement.com/forms/captchas-vs-spambots-why-the-checkbox-captcha-wi... > > > Simple questions where the user can select an answer (not type) will > solve > some of the input-related issues for non-English speakers. > These questions can be of different kinds (e.g., "Which one does not > belong > to the group: Red, Green, Skateboard, Blue?", "Is fire hot or cold?") and > they can be based on text or image selection. > An example of image-based captcha is available at > http://www.picatcha.com/captcha/ > > Tagging media can be also used as a captcha. Google has been > experimenting > with asking users to tag videos as a captcha: > http://cups.cs.cmu.edu/soups/2009/proceedings/a14-kleuver.pdf [PDF] > > > In any case, some experimentation would be required to determine any of > the > above approaches (or combination of several) provides an appropriate > security-usability balance for the specific needs of the Wikipedia. > > > Pau > > > > On Sat, Jul 28, 2012 at 8:29 PM, Platonides Platonides@gmail.com wrote: > >> On 28/07/12 16:55, Everton Zanella Alvarenga wrote: >> > In the conclusion: >> > >> > "Contrary to the common belief, text-based CAPTCHAs can be difficult >> > for foreigners." >> > >> > It is worth reading and likely the same for references there in. The >> > first sentence is similar to what I have experience in 3 classes. And >> > people begin to get anxious and usually say "If I type wrongly again, >> > I'll give up". I've seen 3 students saying this to me. >> > >> > Even if hypothetically had in an experiment that only 1% of foreigners >> > will face difficulties with CAPTCHA in a foreign language (I bet it's >> > much more from real life experience), how much users this would >> > represent in one of the most accessed sites in the world? >> > >> > Tom >> >> There are two types of "foreigners" here: >> - One are speakers of another language written in latin1 (such as >> Brazilians). >> - Another are those who use a diferent writing script, such as Russians >> or Greeks. >> >> In the first case, they should have little problem. Native speakers of >> the language used for the wordlist have an extra help, because they are >> more likely to recognise the words and it can also help them perform >> error recovery. >> >> It would be nice to provide a captcha with a native wordlist, but by >> limiting to ascii characters, it can get pretty universal. >> >> Distortion where a letter looks like a different one is still >> problematic. Even people with English knowledge can have trouble with >> it, so being a native speaker doesn't magically make you invulnerable to >> captcha errors. >> On 16th July of 2007 Arnomane reported a case where "o" distortion made >> it look like an "a", on August I reported another where an "s" looked >> like a "g". >> I expect that using random characters would make it worse, though. >> >> People with other scripts are a different matter. >> * They may not be able to recognise the latin characters. >> * You may be forcing them to change the language layouts for solving the >> captcha. >> * Foreign visitors may not be able to pass your captcha. >> ** Lack of appropiate keyboard layout. >> ** Unable to differenciate the characters (you want me to differenciate >> ت and ث distorted in a noisy background?) >> ** No fonts installed for viewing the characters (eg. 𓀝 vs 𓀞) such as >> if you were trying to browse the in character map the script characters >> of the language (potentially hundreds!) looking for a visual match. >> >> Yet, there are reports such as this by Liangent (native Chinese speaker) >> on this list on 5th February 2011: >> > I hate the case that I'm asked with a Chinese captcha when I'm surfing >> > some Chinese websites without IME available. >> > >> > Besides I don't prefer Chinese captchas personally because Chinese >> > characters usually require more key hits. >> >> >> At least for those languages I think we would need a switch to get a >> captcha in the different "language". >> >> We should also add the "button to get a new captcha" (bug 14230), which >> should help when you get the wrong captcha. >> And I think we should also add a "Problems solving the captcha? Mail us" >> link for those cases when people can't pass the captcha. >> Not that it would solve their problems, but it would at least provide a >> way to lighten their frustration.