This chapter points out data visualization’s double role as explorative and communicative means in humanities research. We draw from science and technology studies looking at the mediation process at stake: the interaction between visualization tool and researcher. To emphasize this mediation process and expose the various decisions at its heart we introduce the term ‘data interface’. We highlight how visualizations function as data interfaces and visualization practices allow for interfacing with data biographing a network graph’s ‘life’. Using the lens of the ‘data interface’ underscores that a particular (network) visualization provides just one perspective on the data. Moreover, we examine if and how the used data interfaces encourage scholars to critically position their investigative work, during research processes and communication.

In this paper we counter the idea that Facebook is a unified medium and stress the need to analyze the distinct qualities of its pages. We do so by exploring the Black Pete discussion on Facebook that ignited when United Nations investigator Verene Shepherd held a plea for the Dutch government to abolish the Saint Nicholas tradition, which features a black-face character, Black Pete. Both quantitative and qualitative methods are employed to interrogate how Facebook mediates this discussion in terms of divergent formatted spaces of participation. Reflecting on our findings against the notions of deliberation, slacktivism and flaming wars, we consider the particular features and potentials of different types of mediation.

In light of the need for political plurality and informed debate this study questions information distribution and curation on Twitter. We contribute to the understanding of ideological homophily by exploring the notion of the 'echo chamber'. Using a sample of two weeks of Dutch Twitter data, we combine network analysis of retweet networks, with qualitative reading and categorisation of engagement with media content in tweets within political topic communities. We found that media references were predominantly framed in affirmative ways in relation to the referenced medium content. Our findings show that users consciously select media messages that correspond with the general sentiment within their topic community, or frame them accordingly. We see this as a willful 'echo chamber', or a 'repillarisation'.

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