Relative frequency of errors among library web pages, by error type (2002)

Example of how to interpret the figures provided below: 89% of the 9 errors detected by Bobby among the UW-Oshkosh library web pages involve missing ALT tags for images, and 11% of the detected errors involve missing ALT tags for image-map hot-spots.

• UW-Colleges (two-year centers)
  
  Absolute number of errors: 4
  No alternative text for image: 100%
  
  
• UW-Eau Claire
  
  Absolute number of errors: 23
  No alternative text for image: 13%
  No alternative text for image-map hot-spot(s): 78%
  Missing frame title: 9%
  
  
• UW-Green Bay
  
  Absolute number of errors: 0
  
  
• UW-La Crosse
  
  Absolute number of errors: 1
  No alternative text for image: 100%
  
  
• UW-Madison
  
  Absolute number of errors: 21
  No alternative text for image-map hot-spot(s): 100%
  
  
• UW-Milwaukee
  
  Absolute number of errors: 90
  No alternative text for image:  97%
  Missing frame title:  2%
  Not readable/usable without frames-capable browsers: 1%
  
  
• UW-Oshkosh
  
  Absolute number of errors: 9
  No alternative text for image:  89%
  No alternative text for image-map hot-spot(s):  11%
  
  
• UW-Parkside
  
  Absolute number of errors: 53
  No alternative text for image:  68%
  No alternative text for image-map hot-spot(s):  30%
  No alternative text for APPLET: 2%
  
  
• UW-Platteville
  
  Absolute number of errors: 5
  No alternative text for image:  100%
  
  
• UW-River Falls
  
  Absolute number of errors: 1
  No alternative text for image:  100%
  
  
• UW-Stevens Point
  
  Absolute number of errors: 19
  No alternative text for image:  32%
  No alternative text for image-map hot-spot(s):  63%
  No alternative text for APPLET: 5%
  
  
• UW-Stout
  
  Absolute number of errors: 18
  No alternative text for image:  100%
  
  
• UW-Superior
  
  Absolute number of errors: 2
  No alternative text for image:  100%
  
  
• UW-Whitewater
  
  Absolute number of errors: 9
  No alternative text for image:  89%
  No alternative text for image-type button:  11%
  
  
• All of the above data combined
  
  Absolute number of errors: 254
  No alternative text for image:  70.2%
  No alternative text for image-map hot-spot(s):  26.67%
  No alternative text for image-type button:  .39%
  No alternative text for APPLET: .78%
  Missing frame title:  1.57%
  Not readable/usable without frames-capable browsers: .39%
  
  

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Created by Axel Schmetzke, Library, University of Wisconsin-Stevens Point.
Last updated 04/12/04 .
Comments are welcome! aschmetz@uwsp.edu