Task Support, Reference, Instruction, or Collaboration? Factors in Determining Electronic Learning and Support Options
http://www.ingentaconnect.com/content/stc/tc/2002/00000049/00000004/art00006
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  peer-reviewed

Gery, Gloria J.
Technical Communication Online
2002

Abstract:

Describes the theory of situated learning, which underlies the selection of a form for supporting performance. Suggests how to apply this concept to the selection of forms.