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.

The two-volume set LNCS 10046 and 10047 constitutes the proceedings of the 8th International Conference on Social Informatics, SocInfo 2016, held in Bellevue, WA, USA, in November 2016. The 33 full papers and 34 poster papers presented in this volume were carefully reviewed and selected from 120 submissions. They are organized in topical sections named: networks, communities, and groups; politics, news, and events; markets, crowds, and consumers; and privacy, health, and well-being.