美国科学60秒 SSS 2013-05-06（在线收听）

 　　Justin Bieber has nearly 39 million followers on twitter, 8 million more than the president. But for those of us who aren't as blessed as Bieber, researchers have come up with a few tips to racking up more followers, based on an analysis of over 500 twitters and a half million tweets over a 15 month period. First, stop talking about yourself. Timely and informative twitts are 30 times more effective at snagging new followers than tweets about your pancakes. Sophisticated language also attracts followers, even within the short format. Since twitter is a web of very weak social ties, often people you've never met. Spare them the bad news about your commute, negativity drives potential followers away. Being guilty of hashtag abuse is another no-no. Limit the use of hashtags, so they manitain some value. The researchers presented their findings at the recent conference on human factors in computing systems in Paris. Of course, one recent report claims that half of Bieber's followers are actually fakes, like spambots, and he gets most of his real followers simply for being famous. To increase your twitter fan base, you have to actually be interested.