Part I. Overtures to Transparency in Social Media -- Introduction -- Socio-Computational Frameworks, Tools and Algorithms for Supporting Transparent Authorship in Social Media Knowledge Markets: Lessons from the second KredibleNet Workshop -- Part II. Assessing Provenance and Pathways in Social Media: Case studies, methods and tools -- Robust Aggregation of Inconsistent Information - Concepts and Research Directions -- Weaponized Crowdsourcing -- The Structures of Twitter Crowds and Conversations -- Visible Effort: Visualizing and measuring group structuration through social entropy -- Stepwise segmented regression analysis: An iterative statistical algorithm to detect and quantify evolutionary and revolutionary transformations in longitudinal data -- Towards Bottom-up Decision Making and Collaborative Knowledge Generation in Urban Infrastructure Projects through Online Social Media -- Biometric-Based User Authentication and Activity Level Detection in a Collaborative Environment -- Part III. Improving transparency through documentation and curation -- In the Flow: Evolving from Utility Based Social Medium to Community Peer -- Ostinato: The exploration-automation cycle of user-centric, process-automated data-driven visual network analytics -- Visual Analytics of User-influence based Dynamic Social Networks using Twitter Data -- Transparency, control and content generation on Wikipedia: Editorial strategies and technical affordances -- Part IV Transparency in social media: ethical and critical dimensions -- Truth Telling and Deception in Internet Society -- Embedding Privacy and Ethical Values in Big Data Technology -- Strategies for critical understanding of social media content.