Managing Three Mediation Effects that Influence PowerPoint Deck Authoring
http://www.ingentaconnect.com/content/stc/tc/2009/00000056/00000001/art00006
  access restricted (by the publisher) to members/subscribers/customers only
  peer-reviewed

Farkas, David K.
Technical Communication Online
2009

Abstract:

Reviews the extreme claims that have been made about PowerPoint. Sets forth practical design ideas that are especially applicable to technical presentations. Explains three ways in which PowerPoint can subtly influence the intended meaning of deck authors and shows how these problems can be addressed.