1 / 13

Usability and Accessibility

Learn about usability and accessibility strategies, testing methods, performance measures, and guidelines to create user-friendly websites. Understand the importance of meeting user goals and site goals, avoiding unnecessary introductions, and designing for consistency. Test usability through factual and task-oriented questions, and gather subjective impressions. Measure success through metrics like time to learn, speed of performance, and user error rates. Consider accessibility concerns such as visual acuity and color blindness, and implement strategies like adhering to guidelines, testing, and providing alternate pages.

tjohnston
Download Presentation

Usability and 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. Usability and Accessibility CIS 376 Bruce R. Maxim UM-Dearborn

  2. Remember user goals Remember site goals Avoid unnecessary introductions Provide logical navigation and interactivity Design for consistency Don’t overuse animation Use sound sparingly Target low bandwidth users Test for usability Macro Media’s Usability Tips

  3. Sample Test for Web Site Usability • Ask users to answer two factual questions based on the web site information • Ask users to answer two task oriented questions from the web site information • Ask users to share the subjective impressions about the ability of the web site content to meet their needs in an interview setting • Have users complete a post test survey regarding their overall experience

  4. Advantages of Usability Metrics • You can track progress between releases • You can assess your competitive position • They help you make stop or go decisions prior to product launch • They can serve as the basis of bonus plans for design managers

  5. Usability Performance Measures • Time to learn • Speed of performance • User error rates • Retention over time • Subjective satisfaction

  6. How many users do you need to measure? • If you are doing qualitative testing, it is enough to obtain data from 3 to 5 users • If you are collecting quantitative data, you should test 20 or more users

  7. Measuring Success • % improvement can be useful (eg. time to complete task in old and new design) • Several % improvement scores are may be combined by computing their geometric mean • Geometric mean in the Nth root of the product of N numbers

  8. What are accessibility concerns? • Low visual acuity • Color blindness • Deafness • Language impairments • Cultural differences

  9. Why make pages more accessible? • Reach as many readers as possible • Automation tools and search engines work better • Concern over customer alienation

  10. Accessibility Strategies • Adhere to accessibility guidelines • Test for accessibility • Provide alternate pages to accommodate users with varying needs

  11. Accessibility Guidelines - part 1 • Tables are fine, IF they read left-right/top-bottom • Text columns are ok if the spacing works in various environments • ’Fancy Stuff' - i.e. fonts, style sheets - as long as page is functional with these options turned off • Provide 'ALT' text for graphics • Make image maps client side • Provide useful text links (e.g. not 'click here')

  12. Accessibility Guidelines - part 2 • Provide good keyboard navigation • Alternatives for controls and applets • Frames/Noframes, (be sure to provide a reasonable 'noframe' option) • Be aware of unusual formats • Avoid scrolling marquees • Provide titles/names for most objects

  13. Testing for Accessibility • Turn off graphics • Turn off sound • Turn off style sheets • Choose "high contrast" option • Use largest font size • Re-size browser window • Navigate using keyboard • Select all text and copy into clipboard, paste elsewhere • Use a specialized browser or analysis tools

More Related