Are 'likes' contagious?

PositionTHE WEB - Brief article

If you "like" a song or a new product on social media, others are more likely to like it too, even if it isn't necessarily that great. That's the implication of a new study that found a "herd mentality" at work in Web ratings--but only on positive ones. Researchers from several schools, including M.I.T., collaborated with an unnamed news-sharing website that allowed them to be first to respond to readers' comments. They randomly assigned comments a thumbs-up, thumbs-down, or--for a control group--nothing at all. Comments that got an initial fake thumbs-up were 32 percent more likely to get a real one from the next person reading them, and...

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