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.