TY - Generic T1 - Friend or Follow: Activities for generating social reputation in Twitter T2 - 6th Conference of the Media Psychology Division of the German Psychological Society Y1 - 2009 A1 - Preussler, Annabell A1 - Michael Kerres ED - Krämer, Nicole C. ED - Sobieraj, Sabrina ED - Pütten von der, Astrid M. JF - 6th Conference of the Media Psychology Division of the German Psychological Society T3 - Media Psychology. New Media and Interactive Systems. CY - Lengerich ER -