Annabelle Sreberny, professor of global media and communications at London's School of Oriental and African Studies, acknowledged that social networks and blogs had proved useful to protesters in the Middle East and Asia, but cautioned against overstating Twitter's significance.

BBC: Twitter page in Farsi

Dr. S. Robert Lichter is Professor of Communications at George Mason University, where he also directs the Center for Media and Public Affairs, which conducts scientific studies of the news and entertainment media, and the Statistical Assessment Service (STATS), which works to improve the quality of statistical and scientific information in the news.

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