SoylentNews

The confidential document dated this year detailed how by monitoring posts, comments and interactions on the site, Facebook can figure out when people as young as 14 feel “defeated”, “overwhelmed”, “stressed”, “anxious”, “nervous”, “stupid”, “silly”, “useless”, and a “failure”.

Such information gathered through a system dubbed sentiment analysis could be used by advertisers to target young Facebook users when they are potentially more vulnerable.