Who is correct, Campbell or Barker?

I have enjoyed reading your interesting discussions of blogging in online learning. Of course originally for me one of the attractions was its uniqueness. The second attraction was that blogs offered us one more technology that we could learn to use in our online courses. That in itself seemed to be a worthwhile reason to use it. The more I use it as a pedagogical tool, the more I can adapt it appropriately for use in teaching online. Now on to the next discussion...

It is interesting to note that both of our textbook authors give us a taxonomy of reviews--Campbell (264) and Barker (221). Bring your own reviewing experience into your discussion. Compare and contrast the two taxonomies and argue for one or the other or a hybrid taxonomy.