Marra, Rose M., Joi L. Moore, and Aimee K. Klimczak. "Content Analysis of Online Discussion Forums: A Comparative Analysis of Protocols." Educational Technology Research and Development 52, no. 2 (2004): 23-40.
Marra et al. compare two approaches for analyzing online forums, taking care to discuss the theoretical and methodological issues relevant in coding discussions for evidence of thinking and learning.