W3C home > Mailing lists > Public > public-cognitive-a11y-tf@w3.org > October 2014

Re: CAPTCHA challenges by cognitive function

From: Steve Lee <steve@opendirective.com>
Date: Mon, 6 Oct 2014 14:08:47 +0100
Message-ID: <CAEsWMvQ_eqh=N7qW6cgkm=Y6rgYMh0vJo0Qiu0NiowA_pVSrog@mail.gmail.com>
To: EA Draffan <ead@ecs.soton.ac.uk>
Cc: "Rochford, John" <john.rochford@umassmed.edu>, "public-cognitive-a11y-tf@w3.org" <public-cognitive-a11y-tf@w3.org>
I agree about speed. Timeouts are supposed to be user selectable in
many case, so why not CAPTCHAs too. However I don't think most are
used in time limited places - eg login.

Also relevent to those with tremors and other physical disbailities
Steve Lee
OpenDirective http://opendirective.com

On 6 October 2014 12:15, EA Draffan <ead@ecs.soton.ac.uk> wrote:
> I do worry about the fact that many individuals with cognitive disabilities are unable to work at speed so by the time they work out what is required or maybe call for help the page needs refreshing or they refresh the page so many times that it times out or the system has been set up to fail them if there are too many attempts.   I am not sure if this is specific enough as it occurs on many other occasions.
> Visual comprehension could include more on visual perception and I just wondered if this breakdown of the types of visual perception may help http://www.visiontherapy4kids.com/ContentPage.aspx?id=52
> Best wishes
> E.A.
> Mrs E.A. Draffan
> WAIS, ECS , University of Southampton
> Tel +44 (0)23 8059 7246
> Mobile +44 (0)7976 289103
> http://access.ecs.soton.ac.uk
> http://www.emptech.info
> From: Rochford, John [mailto:john.rochford@umassmed.edu]
> Sent: 05 October 2014 17:12
> To: public-cognitive-a11y-tf@w3.org
> Subject: CAPTCHA challenges by cognitive function
> Hi All,
> I have categorized, by cognitive function, the challenges people with cognitive disabilities may encounter with CAPTCHA. In doing so, it appears to me there are likely more challenges, especially for the cognitive functions of memory, attention, and math comprehension. I welcome suggestions and feedback.
> People with cognitive disabilities may not be able to:
> . Memory
> o become accustomed to CAPTCHA because there are multiple versions of it
> . Problem-solving
> o complete the multi-step procedure for submitting the CAPTCHA text
> o complete a timed CAPTCHA due to slowness in completing all steps
> . Attention
> o focus due to irrelevant instructions such as "stop spam" and "read books"
> . Reading, linguistic, and verbal comprehension
> o have the advantage of comprehending the meaning of words or images
> o understand text spoken in a computerized and distorted voice
> o recognize characters if they do not form words, or are shown in different fonts/styles
> . Math comprehension
> o enter characters in the correct order
> . Visual comprehension
> o read CAPTCHA text at all because of the intentional distortion of it
> o comprehend text that can't be enlarged without additional distortion
> o understand the purpose of buttons such as reset, listen, and help
> o recognize functional elements, such as buttons, are clickable
> John
> John Rochford
> UMass Medical School/E.K. Shriver Center
> Director, INDEX Program
> Instructor, Family Medicine & Community Health
> http://www.DisabilityInfo.org
> Twitter: @ClearHelper
Received on Monday, 6 October 2014 13:09:15 UTC

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