Activity Sessions datasets

This article contains a set of datasets used to demonstrate a strong regularity in inter-activity time. <strong>See the paper:</strong> User Session Identification Based on Strong Regularities in Inter-activity Time http://arxiv.org/abs/1411.2878 <strong>Abstract</strong> Session identification is a common strategy used to develop metrics for web analytics and behavioral analyses of user-facing systems. Past work has argued that session identification strategies based on an inactivity threshold is inherently arbitrary or advocated that thresholds be set at about 30 minutes. In this work, we demonstrate a strong regularity in the temporal rhythms of user initiated events across several different domains of online activity (incl. video gaming, search, page views and volunteer contributions). We describe a methodology for identifying clusters of user activity and argue that regularity with which these activity clusters appear implies a good rule-of-thumb inactivity threshold of about 1 hour. We conclude with implications that these temporal rhythms may have for system design based on our observations and theories of goal-directed human activity.