Can We Estimate Others' Friendships with a Single Interaction Features on Twitter?

The estimation of others friendships has the important role in a communication to make an appropriate relation. In a face-to-face communication, estimation would be easier because of the facial expressions and other non-verbal information. However, in a text communication such as mail and generic social network service (SNS), we can only obtain text information. Furthermore, estimation would be more difficult than that in a face-to-face communication. In this paper, we investigate the estimation of the friendships between the users on Twitter, which is one of the most popular SNS, with only a single interaction; as opposed to a face-to-face communication where we can guess the others relation almost immediately. Then, the features to estimate the friendships are discussed. The difference between the estimated and actual friendships is also discussed.