Accessibility of services on the web
Download
1 / 13

Accessibility of services on the web - PowerPoint PPT Presentation


  • 124 Views
  • Uploaded on

Accessibility of services on the web. Table of contents. Statistics Definitions Different kinds of disabilities Solutions for accessibility. Statistics. 21.1% of people with vision problems have Internet access 27.2% of people with hearing problems

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Accessibility of services on the web' - brooke


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Table of contents
Table of contents

  • Statistics

  • Definitions

  • Different kinds of disabilities

  • Solutions for accessibility


Statistics
Statistics

  • 21.1% of people with vision problems have Internet access

  • 27.2% of people with hearing problems

  • 22.5% of people with difficulty using hands

  • 42.2% of people with a learning disability

=> 56.7% of non-disabled people

have Internet access

Survey realised in the USA in 2001


Definition
Definition

  • Disability: ”Disability is a physical or mental impairment which has an effect on the ability to carry out normal day-to-day activities”

  • Accessibility: ”Accessibility functionality makes content resources usable by persons with disabilities”

  • Web accessibility: ”Web accessibility refers to the practice of making websites usable by people of all abilities and disabilities”


Different kinds of disabilities
Different kinds of disabilities

  • Visual (blindness, poor eyesight and colour blindness)‏

  • Aural (deafness and impaired hearing)‏

  • Cognitive (dementia and dyslexia)‏

  • Physical or Motor (muscular dystrophy, cerebral palsy)‏


Accessibility of services on the web
W3C

  • W3C (World Wide Web Consortium)‏

  • Founded in 1994 by Tim Berners-Lee

  • Objective: development of web standards and guidelines.

  • Examples: CSS, HTML, XHTML, SOAP, XML, XForms


Accessibility of services on the web
WAI

  • WAI (Web Accessibility Initiative)‏

  • Has been launched by W3C in 1997

  • Objective: creation of international standards and guidelines in order to improve the accessibility of web for people with disabilities


Tools for blind people
Tools for blind people

  • Screenreader

    • Text-to-spreech

    • Braille output device

  • Oralux: Linux distribution


Solutions for visual disability
Solutions for visual disability

  • Use CSS

  • Use headings (H1, H2, H3, H4)‏

  • All informational images use ALT text

  • Provide a site map

  • Make sure that the text can be resized

  • Efficient contrast between background and foreground colours


Solutions for aural disability
Solutions for aural disability

  • For any audio content

    => Provide subtitles or written transcripts


Solutions for cognitive disability
Solutions for cognitive disability

  • Use simple and easy language (non technical)‏

  • Avoid using words in their non-literal sense

  • Avoid using abstractions

  • Use large headings

  • Do not use scrolling text


Solutions for physical or motor disability
Solutions for physical or motor disability

  • These users do not use mouse but only keyboard

    • Use vertical navigation links

  • Avoid flickering between 2 and 55 Hz (epileptic users)‏


Conclusion interpretation
Conclusion/Interpretation

  • Solutions are generally easy to implement

  • Solutions are generally cheap

  • Solutions are usefull for disabled and also valid users