Have you ever watched a video or movie because YouTube or Netflix recommended it to you? Or added a friend on Facebook from the list of “people you may know”? And how does Twitter decide which tweets to show you at the top of your feed? These platforms are driven by algorithms, which rank and recommend content for us based on our data. But can we make decisions freely when we're faced with these choices? ACEMS Associate Investigator Lewis Mitchell explores this question in this story in The Conversation.