C) Related Theories,
Pedagogical Practices and Practical Web-Design Strategies
- 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).
- 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."
- Keep pages short so learners dont 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.
- 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."
- 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.
- 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
todays 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).
- Structure materials as topical modules. This "simplifies selective
reuse of course materials" (Butler 1997, 422).
- 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. Dont 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.
Dont 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.
- Dont 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.
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© 1999 by Peter J. Patsula |
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