Facebook researcher: 'We care about the emotional impact of Facebook'

A Facebook researcher behind a controversial psychology experiment on users has defended the research, saying it was aimed at looking into a common concern that seeing friends post positive content on the social networking website leads people to feel negative or left out. The researchers were also concerned that exposure to friends' negativity might lead people to avoid visiting Facebook. "We didn't clearly state our motivations in the paper," researcher Adam D.I. Kramer wrote on his Facebook p...