- From: Charles McCathieNevile <chaals@opera.com>
- Date: Fri, 12 Aug 2005 15:29:24 +0200
- To: foliot@wats.ca, w3c-wai-ig@w3.org
On Fri, 12 Aug 2005 14:18:45 +0200, John Foliot - WATS.ca <foliot@wats.ca> wrote: > In a 1997 CHI (Computer Human Interface) paper [2], it was noted, "The > basic insight is that, in order to navigate through a world with minimal > prior knowledge of its layout, .... that they [developers - JF] shall > not overwhelm the user with information. In particular for view > navigation, Furnas showed that it is ideal to show only small views (a > relatively small number of choices) that the number of navigation steps > is not too large and that the route to any target must be discoverable." > A Microsoft study [1.2] demonstrated that accuracy diminished as more > "sub-levels" (hierarchy) were added (in other words one nested list > inside the master list is preferred over a list inside of a list inside > of a list). > However, George A. Miller (the original author of "The Magical Number > Seven") noted "The point seems to be that, as we add more variables..., > we increase the total capacity [of differentiation - JF], but we > decrease the accuracy for any particular variable.."[1.1] There's some interesting work done by (among others) Inmaculada Fajardo Bravo at the Univesity of the Basque country, which suggests that there are different cognitive paths taken by "most people" and "most pre-lingually deaf signers". I don't have a reference handy, but it should be findable (I think I have pointed to it on this list in the past). The general point of cognitively overloading a page is pretty sound though, IMHO. There is a trade-off between being able to navigate to anywhere, and being able to work out how to get to where you want to go... and too much choice isn't often helpful. Good site design instead employs multiple paths to the same information, as well as information about "_the_" path (as understood by the site designer). That's why the Web is designed as a web, not a directory tree, although all too often it is built to look like a directory tree. cheers Chaals -- Charles McCathieNevile chaals@opera.com hablo español - je parle français - jeg lærer norsk Here's one we prepared earlier: http://www.opera.com/download
Received on Friday, 12 August 2005 13:29:37 UTC