1 / 22

Web accessibility

Web accessibility. Web accessibility and Disability A Practical introduction. Robin Christopherson and Curt Holst AbilityNet. What is web accessibility?. Web accessibility is about designing sites so as many people

yen
Download Presentation

Web accessibility

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Web accessibility Web accessibility and Disability A Practical introduction Robin Christopherson and Curt Holst AbilityNet

  2. What is web accessibility? Web accessibility is about designing sites so as many people as possible can access them effectively and easily, independent of who they are or how they access the net “ “

  3. Web standards Standards Guidelines created in 1999 to explain how to make websitesand intranetsaccessible to people with disabilities. They are prioritised into three levels: Priority Level 1 - 'Must' or level ‘A’MinimumPriority Level 2 - 'Should', or level ‘Double-A’ Good practice Priority Level 3 - 'Ought' or level ‘Triple-A’ Best practice Web Content Accessibility Guidelines 1.0

  4. Who does it affect? 9.8 million people in the UK have a disability under the DDA. The groups that have specific Issues with web and intranet accessibility are: • Vision impairment • Hearing impairment • Motor difficulties • Cognitive impairments and literacy ~ Many have more than one disability

  5. Vision As a very visual medium, the Web presents unique problems to the millions who have low, restricted or no vision. There are 4 broad categories of vision impairment: • Colour blindness – red/green impairment most common • Mild vision impairment – larger font size, colours • Moderate vision impairment – screen magnification, colours • Blind/severe vision impairment – screen readers

  6. Mild vision impairments – Adjust the Browser

  7. Magnification software

  8. Key guidelines for mild/moderate visual impairments • Do not use colour alone to convey information (level 1) • Ensure a consistent and uncluttered page layout (level 2) • Avoid using graphics for text (level 2) • Choose colours that ensure sufficient background and foreground contrast and avoid combinations of red/green and blue/yellow (level 2/3)

  9. Key guidelines for mild/moderate visual impairments • Ensure all font size definitions are relative -re-sizeable (level 2) • Offer a hi-viz skin and/or link to a page explaining how to change colours and font sizes (level 3) • Use a clear non-seriffed font such as Arial, Tahoma or Verdana (recommended) • Avoid using Flash for text – there are resizing issues (recommended)

  10. Screen-Reader Users

  11. Key guidelines blind web users • Ensure all images have alt tags - especially links, logos and important pictures. Use empty alt tags (alt=“”) for decorative images(level 1) • If you use Flash make sure it works with modern screen readers and provide an accessible alternative for older readers(level 1) • If you use frames ensure they have titles and names that make sense - screen readers navigate in and out of individual frames on a page(level 1) • Make sure tabular data is coded accessibly – use the correct table header tags for column titles(level 1)

  12. Key guidelines blind web users • Provide transcripts for Multimedia if you use it(level 1) • Ensure both JavaScript and Applets work with screen readers –provide alternative content if they don’t. (level 1) • Choose text for hyperlinks with care – make sure it makes sense out of context and avoid repetition(level 2) • Position labels in formsto the left or above input fields and the right of checkboxes and radio buttons(level 2) • Offer a “Skip to content” linkto jump over navigation links(level 3)

  13. Hearing Multimedia, including video and audio clips on the web - provide captioning and transcripts. British Sign Language (BSL) users – limited vocabulary for example ‘Marinade’ Provide a glossary of terms

  14. Motor difficulties People with motor difficulties face challenges when navigating and interacting with web pages. Dexterity, fine motor and coordination difficulties can make using a standard keyboard or mouse difficult. Keyboard and mouse alternatives or voice recognition can be used to navigate and interact with web pages

  15. Hand/Arm Adaptive technology Alternative Pointing Devices

  16. Hand/Arm Adaptive technology Alternative Keyboards

  17. Key guidelines for Motor Difficulties For Keyboard users: • If you use flash or scripts make sure pages are useable with the keyboard (level 2) • Ensure a logical tabbing order through all page elements (level 3) • Use shortcut links – ‘AccessKeys’ for top navigation links (level 3) • Limit the number of links on the page (recommended)

  18. Key guidelines for Motor Difficulties For Mouse users: • Graphical or text links should be a decent size(recommended) • Avoid graphical or text links in close proximity not 1/2/3 (recommended)

  19. Cognitive Difficulties and Dyslexia Cognitive impairments include dyslexia, memory impairments and attention deficit disorders. Recommendations: • Keep the language clear and avoid jargon (level 1) • Use consistent navigation, sitemaps andbreadcrumb trails (level 2) • Keep movement to a minimum or allow user to it turn off (level 2) • Use graphical icons as navigation aids (level 3)

  20. Cognitive Difficulties and Dyslexia Recommendations continued: • Content should be organised logically and clearly (level 3) • There should be sufficient spacing between lines, paragraphs or sections, use bulleted lists (recommended) • Use a clear non-seriffed font and don’t fully justify text (recommended) • Dyslexic web users prefer a beige background (recommended)

  21. Sources of help Many organisations (such as AbilityNet) offer a wide range of services to help you make your websites and intranets accessible, Including: • Audits, • Training • Site design • Disabled user testing Key resources on the web include: • W3C Web accessibility initiative-http://www.w3.org/WAI/ • Irish National Disability Association (NDA) - http://www.accessit.nda.ie/ • Accessify - http://www.accessify.com • A List Apart - developer resources - http://www.alistapart.com

  22. Contact AbilityNet To find out more about AbilityNet’s web services Call:0800 269545 Visit:http://www.abilitynet.org.uk Email: accessibility@abilitynet.org.uk

More Related