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Re: Alternative CAPTCHA


From: Patrick Burke
Date: Aug 25, 2009 5:55PM

At 04:41 PM 8/25/2009, Chris Hoffman wrote:
>There's the first problem with the CAPTCHA right there: It asks you to
>"prove your sentience", as in, "prove that you are a sentient being",
>but the word "sentience" sound a lot like "sentence" (a string of
>words or a prison term) when read aloud, so that's a problem for
>screen reader users.
Actually I think I would blame this one on the speech synthesizer.
Speech synth developers (& screenreading software makers to a lesser
extent) have put in quite a bit of work on getting similar words to
sound different. So, I'd say it's a bug in the speech engine if
sentience & sentence are indistinguishable.

Agree with your other points here.


>Two other problems are that, first, there are only three choices, so
>67% of random clicks from spammers would get through. The second
>problem is that the CAPTCHA problem is not generative. That is, there
>is no way to create new questions automatically.
>On Tue, Aug 25, 2009 at 7:13 PM, Randi< <EMAIL REMOVED> > wrote:
> > Ok, I don't get it. It says, "plese prove your sentance by clicking on
> > the robot" and then there are links saying like "this is a picture of
> > blah blah". I don't get it? Prove what sentence...

Patrick J. Burke

UCLA Disabilities &
Computing Program

Phone: 310 206-6004
E-mail: burke <at> ucla. edu