Part I. Online research methods : Online research methods in the social sciences: An editorial introduction -- Part II. Designing online research : The ethics of online research ; Data quality in online environments -- Part III. Online data capture and data collection : Research design and tools for online research ; Nonreactive data collection online ; What's new? The applications of data mining and big data in the social sciences ; Of instruments and data: Social media uses, abuses and analysis ; 'Big Social Science': Doing Big Data in the Social Sciences -- Part IV. The online survey : Overview: online surveys ; Sampling methods for online surveys ; Online survey design ; Online survey software ; Improving the effectiveness of online data collection by mixing survey modes -- Part V. Digital quantitative analysis : Online social networks: Concepts for data collection and analysis ; Scale, time and activity patterns: advanced methods for the analysis of online networks ; Social Simulation and Online Research Methods ; Games and online research methods ; Data visualisation as an emerging tool for online research ; Online tools for content analysis ; Sentiment analysis for small and big data ; Artificial intelligence/expert systems and online research ; The blogosphere -- Part VII. Virtual ethnography : Ethnographies of online communities and social media: modes, varieties, affordances ; Online interviewing ; Online focus groups ; Tools for collaboration in video-based research ; CAQDAS at a crossroads: affordances of technology in an online environment