incorporating accessibility into your usability reviews
TRANSCRIPT
Incorporating Accessibility into your Usability ReviewsAngela Colter @angelacolter #a11ySTC Tech Comm Summit 2011
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Why bother?
Because recommendations that solve the usability issue
may not solve the accessibility issue.
Because this is an excellent opportunity, maybe the only
one, to bring attention to accessibility.
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Types of disabilitiesVisual Disability Strategies Barriers
Blindness Screen reader (output to
speech synthesizer or
Braille display), text
browser, voice browser
Images with no alternative text, tables
that don’t make sense when read serially,
poorly labeled forms, illogical tab
sequence, lack of keyboard support for
commands
Low vision Large monitor, increase
font size, screen magnifier
Absolute font sizes, loss of context when
enlarged, poor contrast, text in images
Color blindness Style sheet to override
font and background color
Poor contrast, using color only to indicate
important information
Hearing Disability Strategies Barriers
Deafness and
hard-of-hearing
Captions, transcripts Lack of captions, lack of content-related
images, lack of clear and simple language
Source: http://www.w3.org/WAI/EO/Drafts/PWD-Use-Web/
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Types of disabilitiesPhysical Disability Strategies Barriers
Motor impairment Keyboard, specialized
mouse, head-mouse,
head-pointer or mouth-
stick, voice-recognition
software, eye-gaze system,
chording
Time-limited response options, lack of
support for keyboard alternatives to
mouse commands, illogical tab order for
forms.
Dyslexia Getting information
through several modalities
at once
Lack of alternative modalities
Attention deficit
disorder
Turn off animations Distracting elements that cannot be
turned off, lack of clear and consistent
organization
Seizure disorders Turn off animations,
blinking text or audio
Use of visual or audio frequencies that
can trigger seizures
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WCAG 2.0 http://www.w3.org/TR/WCAG20/Principle Guideline Explanation
Perceivable Text alternative Provide text alternatives for any non-text content
Time-based media Provide alternatives for time-based media
Adaptable Create content that can be presented in different ways
without losing information or structure
Distinguishable Make it easier for users to see and hear content
Operable Keyboard accessible Make all functionality available from a keyboard
Enough time Provide users enough time to read and use content
No seizures Don’t design content in a way known to cause seizures
Navigable Provide ways to help users navigate, find content, and
determine where they are
Understandable Readable Make text content readable and understandable
Predictable Make Web pages appear and operate in predictable ways
Input assistance Help users avoid and correct mistakes
Robust Compatible Maximize compatibility with user agents
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Keyboard accessible
Can you do everything with the keyboard that you can with a mouse?
Can you see what has focus?
KeyboardTab through all links and form fieldsTrigger links
Images
Is the same content / functionality conveyed without images?
Web developer toolbar Wave toolbarDisable images Text only
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Forms
Are labels associated with form controls?
Mouse Wave toolbarClick on label Errors, features and alerts
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Color contrast
Is there sufficient contrast?
Graybit
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Color contrast
Is there sufficient contrast?
Paciello Group
Color Contrast Analyser Check contrast ratio of foreground vs. background
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Color contrast
Is there sufficient contrast?
Snook.ca
Color Contrast Check
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Link Text
Does link text make sense out of context?
FangsLinks list
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Text Resize
Is the page readable and functional when text size is doubled?
NoSquintSet text zoom level to 200%
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List of Tools UsedWCAG 2
WebAIM WCAG 2 Checklist
Firefox Web Developer Toolbar
WAVE Toolbar
Paciello Group Color Contrast Analyser
Snook.ca Color Contrast Check
Fangs
NoSquint
Firebug
w3.org/WAI/WCAG20/quickref/
webaim.org/standards/wcag/checklist
addons.mozilla.org/en-US/firefox/addon/60
wave.webaim.org
paciellogroup.com/resources/contrast-analyser.html
snook.ca/technical/colour_contrast/colour.html
addons.mozilla.org/en-US/firefox/addon/402
addons.mozilla.org/en-US/firefox/addon/2592
addons.mozilla.org/en-US/firefox/addon/1843
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Want more?Web: angelacolter.com/tools-for-conducting-an-accessibility-review/Email: [email protected]: @angelacolter