58e34b8c_WBTIC_Primer_on_WBT_Quality_WBT_Quality_Measures_Detail
[0] 12 [The training . . .] . . . demonstrates good usability through excellent user interface design. [Detail] 
There are many rules of good web page design, such things as avoiding "dead-end" branches and nesting branches no more than four levels in depth. Interface design goes further to consider iconic representation, control and information placement, visual and aural cueing, and spatial mapping of the information space. Learning can occur more rapidly when the user is able to make mental order of the information space. This means knowing where he is and how far he has to go in the four-dimensional hypermedia world of web-based training. The training application's usability has direct correlation to the ease of mental navigation in information space and cognizance of one's surroundings.
WBTIC Primer on WBT Quality
Detail