CARROLL - Applying Learning Theories to Online Instructional Design

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C) Related Theories, Pedagogical Practices and Practical Web-Design Strategies
  1. Keep important information at the top of the page. When learners come to a page, they immediately scan for interesting and important information. Good web-design demands that you give your learners the information they want right away and in a hurry. Large graphics at the top of a page may be aesthetically pleasing, but take up too much of the immediate viewable space to be considered instructionally useful (Jones and Farquhar 1997).

  2. Keep frames simple and be consistent in design of text, graphics and sound to limit cognitive overload. Guay advises that "cognitive bandwidth should be minimized to ensure users easily and accurately grasp the message" (as cited in Fahy 1999, 191). He also recommends that graphics and other enhancements should "never obscure the central message of the page" (p. 191). Jones and Farquhar (1997) advise that background to a display should not compete with or obscure the text. Simiarly Gillani & Relan 1997, 236 maintain that "simplicity and consistency eliminates cognitive overload." Thus, multimedia components should be used "to reinforce rather than distract from learning."

  3. Keep pages short so learners don’t have to scroll. Research on the Web suggests that "users do not like to scroll" (Nielsen 1996, as cited in Jones & Farquhar 1997, 243). Guay (1995, as cited in Fahy 1999, 191) agrees with this and advises that "each page should fit on the screen without scrolling." West (1998, as cited in Fahy 1999, 192) similarly advises that "the requirement for the user to scroll down in Web-based documents should be kept to a minimum, as many users will not scroll more than 3 times before abandoning a site." West also estimates that readers give only between 7 and 15 seconds to assess the probable usefulness of a site before leaving it. It should be noted that "the problem with making pages short is that people may choose to print out certain pieces of information, or download the entire contents of a group of pages. This [problem can be solved] by combining all of the pages into a single document that is labeled as such" (Jones and Farquar, 1997, 243). A print button can be provided so that users can eaisly print longer material for off-screen reading.

  4. Keep pages uncluttered by extracting unnecessary elements. Broadbents’ theory of single-channel processing states that "humans are capable of processing information through only one channel at a time and that it is not possible to process two channels simultaneously"(Hsia 1968, as cited in Szabo 1998, 32). If this were to happen, audio and visual stimuli would arrive at the central nervous system simultaneously, causing the information to jam, and lead to poorer retention of material (Broadbent 1958, as cited in Szabo 1998, 32). Guay (1995 as cited in Fahy 1999, 192) recommends that "each page should be uncluttered, readable, and balanced."

  5. Pages should download in 30 seconds or less with 14.4 modem. Guay advises that "physical bandwidth should be minimized to ensure acceptable access and response times" (1995 as cited in Fahy 1999, 191). Special consideration should be given to logos, banners, .pdf files, audio, and video to make sure that these files do not slow down the site too much. Guay also suggests that tagging graphics (in HTML) with vertical and horizontal size can speed download. Commercial graphics tools such as Adobe ImageReady 2.0 can also reduce graphics size by among other things reducing the color pallet.

  6. Screen excess information. Good design, as Carroll recommends, must reduce excess information and allow learners to fill in the gaps. In support of this, Dede (1996, 13) maintains that the curriculum is "overcrowded with low-level information" and as a result, "teachers [must] frantically race through required material, helping students memorize factual data to be regurgitated on mandated, standardized tests." Dede also advises that "the core skill for today’s workplace is not foraging for date, but filtering a plethora of incoming information." He adds that as we increasingly are required to dive into a sea of information we must master the ability to immerse ourselves in data "to harvest patterns of knowledge just as fish extract oxygen from water via their gills" (p. 6).

  7. Structure materials as topical modules. This "simplifies selective reuse of course materials" (Butler 1997, 422).

  8. Strive for quality not quantity. Rockley (1997, as cited in Fahy 1999, 196-197) gives the following advice for the planning and management of Web-based resources:
  • Design small. Make what you have effective, then add to it. Don’t attempt to do everything at once.
  • Keep effects simple. Assure effects ADD to the message/content.
  • Map out the whole site. Both for development and maintenance.
  • Plan for growth. Anticipate and direct it.
  • Get feedback from users. And pay attention to it.
  • Test any outside links regularly. Don’t’ link to sites which do not appear to be will maintained or stable.
  • Give only one person edit privileges. Only one person should have site maintenance responsibilities.
  • Don’t post any part of a site while it is still under construction. Everything on your site should work now. Instead of "under construction, put up announcements of the expected availability of "coming" or "new" features.

© 1999 by Peter J. Patsula

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