news. researchers measured how recipients responded on line, quoting a study in the national academy of science. when positive expressions were produced people poused fewer positive posts and more negative posts. when negative expressions were reduced, the opposite pattern occurred. the research concluded that online messages influence emotions which could affect how you behave when you are not online. in other words, if you feel depressed today, because, it may be because, your aunt tilly posted she has a bad cold and you got bummed out. reaction from facebook users to the study, well, that was swift and negative and critics calling it unethical manipulation of user emotions. facebook s user data policy clearly states information can be used for what it calls, reserve. one of the researchers who worked on study posted a message on his facebook page and said in part, i can tell you that our goal was never to upset anyone. he goes on to say, my coauthors