Major news organizations are using Twitter to disseminate their stories but still aren’t tapping the full potential of the San Francisco microblogging service to reach their audiences, according to a study released today.

News organizations are primarily using Twitter feeds to drive traffic back to their own stories, but don’t seem to be using tweets to help with reporting or generating two-way dialogue with readers and viewers, according to the Pew Research Center’s Project in Excellence in Journalism.

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