Testing Visual-Based Modules for Teaching Writing
http://www.ingentaconnect.com/content/stc/tc/1998/00000045/00000001/art00006
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  peer-reviewed

Markel, Mike
Technical Communication Online
1998

Abstract:

A study of novice writers shows that instructional materials about writing that incorporate basic principles of visual design are more effective than those that are primarily verbal. Less-capable writers benefit most from materials that include the extra text-processing cues provided by the visual design. Narrative comments about the instructional materials show that writers are aware of the design elements and appreciate them. Technical communication practitioners, researchers, trainers, and instructors have a large role to play in improving the way writing is taught.