RE: For you: A webpage that is 100% accessible to all people around the world, regardless of nationality or disability or Assistive Technology

Ah, woops…

You are welcome to add that one in J

 

From: mark.sadecki@gmail.com [mailto:mark.sadecki@gmail.com] On Behalf Of Mark Sadecki
Sent: Thursday, August 14, 2014 1:18 PM
To: Bryan Garaventa
Cc: w3c-wai-ig@w3.org
Subject: Re: For you: A webpage that is 100% accessible to all people around the world, regardless of nationality or disability or Assistive Technology

 

Bryan,

 

This can’t be right.  At no point have you even considered the reradicating, octally repeating, sesquidecimated equinox factor.  Once considered, the accessibility percentage should round nicely to 97.82.

 

Best,

 

Mark

 

On Thu, Aug 14, 2014 at 3:58 PM, Bryan Garaventa <bryan.garaventa@whatsock.com> wrote:

Recently, somebody asked me to show them a website that was 100% accessible, so I figured it would make a good experiment. Sort of a thought experiment I guess...

 

So I built a webpage that is 100% accessible to all people in the world equally, regardless of nationality, disability type, or Assistive Technology used.

 

Enjoy! It's available at

http://whatsock.com/test/100_percent_accessible.htm

Happy testing.

 

With this 100% accessible baseline to start from, the accessibility percentage for all web technologies everywhere, scales downward to account for requisite variables, so that no web technology anywhere can be 100% accessible as a result.

 

To demonstrate this, I also wrote the following algorithm, that calculates the general percentage of accessibility for any given web technology.

 

X = (1 * Disability-Type * Browser-AT * Site-Interactivity * Site-Complexity * User-Experience)

P = (Hardware * ((((1 * OS-AT) - X) * Accessibility-Level) + X)) * 100

 

P is the general Percentage of accessibility calculated for a particular website or web technology feature, which is based on the following estimated values for each variable in the formula.

 

Disability-Type

0.01: Deaf-Blind + Motor-Impaired

0.1: Deaf-Blind

0.2: Deaf + Motor-Impaired

0.3: Blind + Motor-Impaired

0.4: Partially Sighted + Motor-Impaired

0.5: Motor-Impaired

0.6: Blind

0.7: Deaf + Partially Sighted

0.8: Partially Sighted

0.9: Deaf

 

Browser-AT

1: No AT

0.98: Internet Explorer + JAWS

0.93: Internet Explorer + NVDA

0.95: Firefox + JAWS

0.98: Firefox + NVDA

0.95: Safari + VoiceOver

0.6: Chrome + JAWS

0.7: Chrome + NVDA

0.95: Internet Explorer or Firefox or Chrome + Dragon

0.98: Internet Explorer or Firefox or Chrome + ZoomText

0.9: Internet Explorer or Firefox or Chrome or Safari + Braille Display

 

Site-Interactivity

1: Contains All Static Elements

0.9: Contains Interactive Features

 

Site-Complexity

1: Simple

0.95: Medium

0.9: Complex

 

User-Experience

1: Advanced

0.95: Intermediate

0.9: Beginner

 

Hardware

0: None

1: Computer

 

OS-AT

0.001: No AT

0.99: Windows + JAWS

0.99: Windows + NVDA

0.99: Windows + Dragon

0.99: Windows + ZoomText

0.99: iOS + VoiceOver

0.99: OS X + VoiceOver

0.9: Windows or iOS or OS X + Braille Display

 

Accessibility-Level

0.98: Fully Keyboard Accessible + ARIA Standards Compliant (when applicable) + WCAG Compliant

0.3: Fully Keyboard Accessible + ARIA Standards Compliant (when applicable) but not WCAG Compliant

0.3: Fully Keyboard Accessible but not ARIA Standards Compliant (when applicable) + WCAG Compliant

0.2: Fully Keyboard Accessible but not ARIA Standards Compliant (when applicable) nor WCAG Compliant

0.1: ARIA Standards Compliant (when applicable) but not Fully Keyboard Accessible nor WCAG Compliant

0.01: Neither Fully Keyboard Accessible nor ARIA Standards Compliant (when applicable) nor WCAG Compliant

 

(More constants can always be added or adjusted)

 

For example:

 

(1 * .6 * .95 * .9 * .9 * .9) = 0.41553

(1 * ((((1 * 0.99) - 0.41553) * .98) + 0.41553)) * 100 = 97.85106

 

So roughly calculated, a Blind person(.6) using Safari+VoiceOver(.95) accessing a website that Contains Interactive Features(.9) that is Complex(.9) when the user is a Beginner(.9),

in combination with Hardware(1) that includes iOS+VoiceOver(.99), upon a website that is 

Fully Keyboard Accessible + ARIA Standards Compliant (when applicable) + WCAG Compliant(.98), will have a general accessibility Percentage of 97.8.

 

Like I said, these are just estimates, but I thought it would make an interesting experiment.

 

Best wishes,

Bryan