[Air-l] Source of research sought

I'm looking for research on people who respond to opinions or ideas they read in listservs or on Internet sites. If I remember correctly, people who write in response to an idea they read on a listserv tend to disagree with the published statement. Is that so? Who has conducted research on this phenomenon? I am studying email responses to an essay that appeared in a political opinion web site. Thanks for any help you can provide. Chris Ogan Professor of Journalism School of Journalism 206a Ernie Pyle Hall 970 E. Seventh Street Indiana University Bloomington, IN 47405-7108 812-855-1699 Fax: 812-855-0901 www.indiana.edu/~oganjour Associate Dean for Graduate Studies and Research Professor of Informatics 211 Informatics 901 E. Tenth Street Bloomington, IN 47408-3912 812-855-1699 Fax: 812-856-4764