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

Example of how to interpret the figures provided below: 99% of the 132 errors detected by Bobby among the UW-Colleges web pages involve missing ALT tags for images, and 1% of the detected errors involve missing ALT tags for image-map hot-spots.

• UW-Colleges (two-year centers)
  
  Absolute number of errors: 132
  No alternative text for image: 99%
  No alternative text for image-map hot-spot(s): 1%
  
  
• UW-Eau Claire
  
  Absolute number of errors: 9
  No alternative text for image: 100%
  
  
• UW-Green Bay
  
  Absolute number of errors: 253
  No alternative text for image: 70%
  No alternative text for image-map hot-spot(s): 30%
  
  
• UW-La Crosse
  
  Absolute number of errors: 45
  No alternative text for image: 80%
  No alternative text for image-map hot-spot(s): 20%
  
  
• UW-Madison
  
  Absolute number of errors: 2
  No alternative text for image: 100%
   
• UW-Milwaukee
  
  Absolute number of errors: 136
  No alternative text for image: 98%
  No alternative text for image-map hot-spot(s): 1%
  No alternative text for image-type button: 1%
  
  
• UW-Oshkosh
  
  Absolute number of errors: 68
  No alternative text for image: 100%
  
  
• UW-Parkside
  
  Absolute number of errors: 132
  No alternative text for image: 82%
  No alternative text for image-map hot-spot(s): 14%
  No alternative text for image-type button: 2%
  No alternative text for APPLET: 2%
  
  
• UW-Platteville
  
  Absolute number of errors: 29
  No alternative text for image: 83%
  No alternative text for image-map hot-spot(s): 17%
  
  
• UW-River Falls
  
  Absolute number of errors: 9
  No alternative text for image: 89%
  No alternative text for APPLET: 11%
  
  
• UW-Stevens Point
  
  Absolute number of errors: 56
  No alternative text for image: 68%
  No alternative text for image-map hot-spot(s): 27%
  No alternative text for APPLET: 2%
  Missing frame title: 4%
  
  
• UW-Stout
  
  Absolute number of errors: 35
  No alternative text for image: 91%
  No alternative text for image-map hot-spot(s): 3%
  No alternative text for image-type button: 6%
  
  
• UW-Superior
  
  Absolute number of errors: 27
  No alternative text for image: 100%
  
  
• UW-Whitewater
  
  Absolute number of errors: 92
  No alternative text for image: 17%
  No alternative text for image-map hot-spot(s): 75%
  Missing frame title: 7%
  Not readable/usable without frames-capable browsers: 1%
  
  
• All of the above data combined
  
  Absolute number of errors: 1024
  No alternative text for image: 79.12%
  No alternative text for image-map hot-spot(s): 19.02%
  No alternative text for image-type button: .59%
  No alternative text for APPLET: .39%
  Missing frame title: .78%
  Not readable/usable without frames-capable browsers: .1%

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Created by Axel Schmetzke, Library, University of Wisconsin-Stevens Point.
Last updated 03/30/03 .
Comments are welcome! aschmetz@uwsp.edu