Poster Papers: Networks, Communities and Groups.- Towards Understanding User Participation in Q&A Social Networks Using Profile Data.- DeBot: Twitter Bot Detection via Activity Correlation.- Predicting online extremism, content adopters, and interaction reciprocity.- Content Centrality Measure for Networks: Introducing Distance-Based Decay Weights.- A Holistic Approach for Predicting Links in Coevolving Multiplex Networks.- Twitter Session Analytics: Profiling Users' Short-term Behavioral Changes.- Senior Programmers: Characteristics of Elderly Users from Stack Overflow.- Localized Prediction of Re-tweet Behavior in Online Social Networks.- Social Influence: from Contagion to a Richer Causal Understanding.- Influence Maximization on Complex Networks with Intrinsic Nodal Activation.- Applicability of Sequence Analysis Methods in Analyzing Peer-Production Systems: A Case Study in Wikidata.- Network-Oriented Modelling and its Conceptual Foundations.- Poster Papers: Politics, News,and Events.- Social Contribution Settings and Newcomer Retention in Humanitarian Crowd Mapping.- A Relevant Content Filtering Based Framework For Data Stream Summarization .- Relevancer: Finding and Labeling Relevant Information in Tweet Collections.- Analyzing Large-Scale Public Campaigns on Twitter.- Colombian regulations for the implementation of Cognitive Radio in Smart Grids.- Using demographics in predicting election results with Twitter.- On the influence of social bots in online protests. Preliminary findings of a Mexican case study.- What am I not seeing? An Interactive Approach to Social Content Discovery in Microblogs.- Poster Papers: Markets, Crowds, and Consumers.- Targeted Ads Experiment on Instagram.- Exploratory Analysis of Marketing and Non-Marketing E-Cigarette Themes on Twitter.- Obtaining Rephrased Microtask Questions from Crowds.- To Buy or Not to Buy? Understanding the Role of Personality Traits in Predicting Consumer Behaviors.- What Motivates People to Use Bitcoin Spiteful, OneOff, and Kind: Predicting Customer Feedback Behavior on Twitter.- Poster Papers: Privacy, Health and Wellbeing.- Validation of a computational model for mood and social integration.- PPM: A Privacy Prediction Model for Online Social Networks.- Privacy Inference Analysis in EventBased Social Networks.- Empirical Analysis of Social Support Provided via Social Media.- User generated vs. supported contents: which one can better predict Basic Human Values.- An application of rule-induction based method in psychological measurement for application in HCI research.- A Language-Centric Study of Twitter Connectivity.- Investigate Regional Prejudice in China through the Lens of Weibo.