UNIVERSITY OF SALAMANCA DEPARTMENT OF SOCIOLOGY AND COMMUNICATION Interethnic Contact in Computer-mediated Communication: Anonymity Effects and Stereotype Disconfirmation on Prejudice Reduction and Out-group Attraction. (Shortened version) A Dissertation submitted in partial satisfaction of the requirements for the Doctoral degree in Audiovisual Communication by: JOSÉ SALVADOR ALVÍDREZ VILLEGAS Advisor: Dr. Juan José Igartua Perosanz Salamanca, 2012