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Accessibility Testing By Audience Need Elizabeth J. Pyatt, Ph.D. Christian Vinten-Johansen Information Technology Services.

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Presentation on theme: "Accessibility Testing By Audience Need Elizabeth J. Pyatt, Ph.D. Christian Vinten-Johansen Information Technology Services."— Presentation transcript:

1 Accessibility Testing By Audience Need Elizabeth J. Pyatt, Ph.D. (ejp10@psu.edu) Christian Vinten-Johansen (cjohansen@psu.edu) Information Technology Services

2 Why Audience? Different types of disabilities  Visual Impairments, Hearing Impairments, Motion Impairments, Cognitive/Learning Disabilities But needs remain the same across tech  A video is a video no matter the extension and will need caption Everyone will be temporarily disabled

3 Severe Visual Impairment Requires a screen reader to read Web content aloud  Multimedia, images need to be described Not all descriptions need to be hidden  Program elements need to identify themselves Hidden Audience  Text-based mobile device, missing plugin, images disabled, or broken image link

4 What the “ALT Tag” does Piston diagram images Text describes piston position

5 ALT Tagger in ANGEL Enter information “Alternative Text” field when uploading images

6 New Apps Gotcha Not all apps and plugins include information for screen reader  Old iTunes: MP3 music files were accessbile, but navigation in iTunes was not  Some users encounter difficulty creating a login! (esp Flash based interface)  Web Forms – Need to signal new information See WAI-ARIA for how to code. JavaScript CAN be accessible.

7 Low Vision Users May zoom browser 200% or more  Good color contrast (light vs dark)  Fonts should be extra legible on Web  Text zooms better than images  Extra legible fonts Hidden Audience  iPhone users  Older users Will Kindle make a difference?

8 At 300% Zoom Which part of content is an image? Equation

9 A Little Hard on the Eyes Tiny Text (7/8 pt) Light gray field labels Can you see the text? An entire page in a cursive font?

10 Color Deficient users Primarily Red/Green (10% men)  Design so information viewable in black and white (or grayscale)  Underline your text links  Supplement color coding with shape Red X and Green √ Hidden Audience  People with a black and white printer ANGEL Quiz Scores X & √

11 Different Colored World Color coded text Color deficient: Shades of brown and blue Color coded currency exchange. Green = up, red = down Deuteranopia view (Photoshop Proof) Up/down arrows still informative

12 Hearing Impaired You cannot hear content  Captions, captions, captions (or transcript)  Some users more fluent in sign language Hidden Users  Forgot headphone in lab  Audio cuts out  Can’t find one of 5 volume controls  Poor audio quality (even for normal hearing)  50% students used captions in online class

13 Captions Reveal Information Caption shows how to spell Cole Camplese’s name.

14 Motion Impaired Keyboard always easier than mouse  Enable keyboard tabbing on forms  Develop text-based alternative (esp. drop down menus)  Keyboard shortcuts  BIG click targets & avoid disappearing controls Hidden Audience  Carpal tunnel, broken wrist, essential tremor,  New to mouse, iPhone, track pad…

15 Cognitive Disabilities Interface should be simple and consistent  Use same language throughout site/tool  Use language audience will understand  Restrict icons to the basics (e.g. arrow icon)  Provide “Global View” (all options at once)  Don’t hide information too quickly  Let user start/stop animation & audio

16 Hidden Audience Everyone appreciates usability Learners often have “simpler” mental models than experts  Includes instructors learning new tech! What are these icons? Icons + labels

17 General Tips Learn easy fixes for tool  Most fixes are easy fixes (e.g. fill in the ALT tag field in ANGEL image upload) Think alternate tech  Can an MP3 file be delivered by blog as well as iTunes?  Can a blog be delivered by e-mail? Captions  Write script or recruit “cheap transcription labor”

18 General Tips 2 HTML is still the most accessible tech  Use Flash for multimedia, but not navigation  Use PDF only for files which CAN’T be delivered any other way Asynhchronous (e-mail, discussion board) can be more accessible than synchronous (e.g. chat, Connect)  Text chat may be more accessible than audio (if student hearing impaired)  Or maybe use the phone (if on screen reader)

19 Key Resources Penn State  http://accessibility.psu.edu/ (Penn State Hub) http://accessibility.psu.edu/ iCITA (Illinois)  http://fae.cita.uiuc.edu (FAE Evaluator) http://fae.cita.uiuc.edu  http://firefox.cita.uiuc.edu (Firefox Plugin) http://firefox.cita.uiuc.edu WebAIM  http://www.webaim.org (WebAIM) http://www.webaim.org  http://wave.webaim.org (Visual Evaluator) http://wave.webaim.org

20 Key Resources Accessible Web Publishing Wizard  http://www.virtual508.com/ http://www.virtual508.com/ Microsoft® Word to HTML Microsoft® Powerpoint to HTML Parity  Practical video captioning  Contact Pat Besong (pzb4@psu.edu)pzb4@psu.edu

21 Key Resources Accessible Web Publishing Wizard  http://www.virtual508.com/ http://www.virtual508.com/ Microsoft® Word to HTML Microsoft® Powerpoint to HTML Parity  Practical video captioning  Contact Pat Besong (pzb4@psu.edu)pzb4@psu.edu

22 Key Resources Web Publishing System (CMS)  Encoded accessibility rules  Roles Multiple authors: designer, faculty SME Gatekeeper  Workflow  Protected templates and styles

23 At the end of the day... Human judgement over automated tools Work roles and responsibilities:  Train faculty and instructional designers in accessibility - and -  “Gatekeeper”: accessibility / editorial specialist in the workflow


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