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The next speaker at Web Science 2016 is Onur Varol, who points out the wide variety of purposes for which people use social media, and notes that we change our online persona and usage styles according to different communicative contexts. Can we match language style and user intent, then?

The project's experiments found that messages written using logical arguments are perceived as more authoritative, while an absence of logical content makes the sender appear more likeable; the communication style also varies across different fields of interest (products, health, politics).

URL cascades tend to be more likely to involve relatively similar …

The next speaker at Web Science 2016 is Jenna Mittelmeier, whose focus is on cross-cultural collaboration. Group work has always been difficult, and the majority of online contributions are from a small subset of all users; this free riding by non-participants is especially problematic in educational settings that require all users to participate equally.

How do users offline networks translate into their online collaboration practices? Jenna's study examined a group of 118 students in the UK, including 92% international students; these students varied from having highly homophilous to very country-diverse networks. These networks did not have any direct influence in …

The next session at Web Science 2016 starts with a paper by Jure Leskovec on information cascades. Such cascades emerge as users of social media platforms (re)share content through their networks, and the prediction of such processes is traditionally very difficult.

One question in such predictions is whether a given cascade will reach the median size observed in historical cascades; because of how the median is defined, even a blind guess on this question will have a 50% success rate.

But cascades on a platform like Twitter can consist of multiple cascade trees sharing the same information, as pieces of …

The final speaker in this Web Science 2016 session is Daniel Alexandrov, whose interest is in the use of social networking platforms in politics across the Caucasus region. This is a diverse and politically tense region, with several intractable political conflicts.

The project focussed on Armenia, Azerbaijan, Georgian, and pan-Caucasian groups on the social media platforms VKontakte – the "virtual Caucasus" space –, which is dominated by relatively young users and subdivides into a number of groups. These groups have overlapping memberships and distribute across a number of clusters; Caucasian and Georgian groups tend to have the highest betweenness centrality …

The third speaker in this session at Web Science 2016 is Gefion Thuermer, whose interest is in decision-making processes within political parties. Such processes must be equal and inclusive, which may be a problem the more Internet-based communication tools play a role.

Attitudes towards such exclusion differ widely across parties. Greens politicians in Germany have traditionally been very concerned about avoiding exclusionary processes, while Pirate Party politicians assume that everybody is online and claim never to have met an 'Offline Pirate'. This means that the Green Party has traditionally developed its own processes and used Internet technologies only for administrative …

Next up at Web Science 2016 is Yelena Mejova, who presents a paper on the new 'quote retweet' feature that Twitter introduced in April 2015. This form of retweeting includes the retweeted tweet as a URL in the retweet, and can be used for somewhat different purposes from other forms of retweeting: while button retweets may imply an endorsement of the original message, the substantial space for including the retweeter's views in a quote retweet might be used for more critical engagement with the quoted material, for instance.

This study builds on the dataset of 192 US political accounts maintained …

I'm now in the "Politics and the Web" session at Web Science 2016, and we're starting with a paper by Pablo Loyola, whose focus is on politics in Chile. This work is interested in the collective decision-making processes involved in constructing new legislation, and builds on the voting behaviours of MPs and on drafts-in-progress of new bills. Are these processes influenced by the funding that MPs receive from corporate interests?

The project took a Web-centric approach to this: it identified Web content reflecting different ideological positions on a range of legislative issues, and using these corpora assessed the similarity …

Next at Web Science 2016 is Sergej Sizov, who focusses on the economic value of Web advertising. This is surprisingly difficult to calculate, and Sergej begins with the hypothetical example of a small Web advertising campaign. We may make a range of assumptions about click-through and purchase rates, but variance matters: in a substantial number of cases, campaigns may generate no profit whatsoever.

Each campaign constitutes a large number of small events (clicks, conversions, ...), and these can be modelled computationally; from these emerge certain predictions about the probability to make a given profit from the campaign.