This article was retracted by the corresponding author, Wen-Bin Chiou, on August 9, 2013, after problems were discovered with the data.

Social networking sites (SNSs) provide users with an efficient interface for distributing information, such as photos or wall posts, to many others simultaneously. We demonstrated experimentally that this type of indiscriminate one-to-many (i.e., monologue) communication may induce self-focused...