Adrian Rauchfleisch

Bio: Adrian Rauchfleisch is an academic researcher from National Taiwan University. The author has contributed to research in topics: Social media & Public sphere. The author has an hindex of 16, co-authored 37 publications receiving 553 citations. Previous affiliations of Adrian Rauchfleisch include University of Zurich.

Multiple public spheres of Weibo: a typology of forms and potentials of online public spheres in China

Abstract: The advent of online media, and particularly social media, has led to scholarly debates about their implications. Authoritarian countries are interesting in this respect because social media might facilitate open and critical debates that are not possible in traditional media. China is arguably the most relevant and interesting case in this respect, because it limits the influx of non-domestic social media communication, has established its own microcosm of social media and tries to closely monitor and control it and censor problematic content. While such censorship is very effective in some instances, however, it fails to shut down all open debates completely. We analyse the pre-eminent Chinese social media platform – Sina Weibo – and present a typology of different kinds of public spheres that exist on this platform in which open and critical debates can occur under specific circumstances: Thematic public spheres include phenomena of common concern, such as environmental pollution or food safety; short-...

The False positive problem of automatic bot detection in social science research.

Abstract: The identification of bots is an important and complicated task. The bot classifier "Botometer" was successfully introduced as a way to estimate the number of bots in a given list of accounts and, as a consequence, has been frequently used in academic publications. Given its relevance for academic research and our understanding of the presence of automated accounts in any given Twitter discourse, we are interested in Botometer's diagnostic ability over time. To do so, we collected the Botometer scores for five datasets (three verified as bots, two verified as human; n = 4,134) in two languages (English/German) over three months. We show that the Botometer scores are imprecise when it comes to estimating bots; especially in a different language. We further show in an analysis of Botometer scores over time that Botometer's thresholds, even when used very conservatively, are prone to variance, which, in turn, will lead to false negatives (i.e., bots being classified as humans) and false positives (i.e., humans being classified as bots). This has immediate consequences for academic research as most studies in social science using the tool will unknowingly count a high number of human users as bots and vice versa. We conclude our study with a discussion about how computational social scientists should evaluate machine learning systems that are developed for identifying bots.

The different audiences of science communication: A segmentation analysis of the Swiss population's perceptions of science and their information and media use patterns.

Abstract: Few studies have assessed whether populations can be divided into segments with different perceptions of science. We provide such an analysis and assess whether these segments exhibit specific patterns of media and information use. Based on representative survey data from Switzerland, we use latent class analysis to reconstruct four segments: the “Sciencephiles,” with strong interest for science, extensive knowledge, and a pronounced belief in its potential, who use a variety of sources intensively; the “Critically Interested,” also with strong interest and support for science but with less trust in it, who use similar sources but are more cautious toward them; the “Passive Supporters” with moderate levels of interest, trust, and knowledge and tempered perceptions of science, who use fewer sources; and the “Disengaged,” who are not interested in science, do not know much about it, harbor critical views toward it, and encounter it—if at all—mostly through television.

Digital astroturfing in politics: Definition, typology, and countermeasures

Abstract: In recent years, several instances of political actors who created fake grassroots activity on the Internet have been uncovered. We propose to call such fake online grassroots activity digital astroturfing, and we define it as a form of manufactured, deceptive and strategic top-down activity on the Internet initiated by political actors that mimics bottom-up activity by autonomous individuals. The goal of this paper is to lay out a conceptual map of the phenomenon of digital astroturfing in politics. To that end, we introduce, first, a typology of digital astroturfing according to three dimensions (target, actor type, goals), and, second, the concept of digital astroturfing repertoires, the possible combinations of tools, venues and actions used in digital astroturfing efforts. Furthermore, we explore possible restrictive and incentivizing countermeasures against digital astroturfing. Finally, we discuss prospects for future research: Even though empirical research on digital astroturfing is difficult, it is neither impossible nor futile.

The special case of Switzerland: Swiss politicians on Twitter:

Abstract: We analyse the use of Twitter in political communication in Switzerland because, in comparison with other democracies, Switzerland with its strong federalism, fragmented party system, small country size and semi-professional politicians can be seen as the least-likely critical case, thus creating unique conditions for the use of social media. The study investigates the individual characteristics of Swiss Members of Parliament that could influence social media usage. Thus, the study contributes to the debate about equalization and normalization with respect to Twitter as a relevant microblogging channel for political communication and to the significance of country-specific conditions for the adoption of innovations in political online communication. The study explains the shift from equalization towards normalization with the diffusion of innovations theory.

Random graphs

Abstract: We will review some of the major results in random graphs and some of the more challenging open problems. We will cover algorithmic and structural questions. We will touch on newer models, including those related to the WWW.

Nudge: Improving Decisions about Health, Wealth, and Happiness

Abstract: NUDGE: IMPROVING DECISIONS ABOUT HEALTH, WEALTH, AND HAPPINESS by Richard H. Thaler and Cass R. Sunstein Penguin Books, 2009, 312 pp, ISBN 978-0-14-311526-7This book is best described formally as a general explanation of and advocacy for libertarian paternalism, a term coined by the authors in earlier publications. Informally, it is about how leaders, systems, organizations, and governments can nudge people to do the things the nudgers want and need done for the betterment of the nudgees, or of society. It is paternalism in the sense that "it is legitimate for choice architects to try to influence people's behavior in order to make their lives longer, healthier, and better", (p. 5) It is libertarian in that "people should be free to do what they like - and to opt out of undesirable arrangements if they want to do so", (p. 5) The built-in possibility of opting out or making a different choice preserves freedom of choice even though people's behavior has been influenced by the nature of the presentation of the information or by the structure of the decisionmaking system. I had never heard of libertarian paternalism before reading this book, and I now find it fascinating.Written for a general audience, this book contains mostly social and behavioral science theory and models, but there is considerable discussion of structure and process that has roots in mathematical and quantitative modeling. One of the main applications of this social system is economic choice in investing, selecting and purchasing products and services, systems of taxes, banking (mortgages, borrowing, savings), and retirement systems. Other quantitative social choice systems discussed include environmental effects, health care plans, gambling, and organ donations. Softer issues that are also subject to a nudge-based approach are marriage, education, eating, drinking, smoking, influence, spread of information, and politics. There is something in this book for everyone.The basis for this libertarian paternalism concept is in the social theory called "science of choice", the study of the design and implementation of influence systems on various kinds of people. The terms Econs and Humans, are used to refer to people with either considerable or little rational decision-making talent, respectively. The various libertarian paternalism concepts and systems presented are tested and compared in light of these two types of people. Two foundational issues that this book has in common with another book, Network of Echoes: Imitation, Innovation and Invisible Leaders, that was also reviewed for this issue of the Journal are that 1 ) there are two modes of thinking (or components of the brain) - an automatic (intuitive) process and a reflective (rational) process and 2) the need for conformity and the desire for imitation are powerful forces in human behavior. …

Two Treatises of Government.

Abstract: All these premises having, as I think, been clearly made out, it is impossible that the rulers now on earth should make any benefit, or derive any the least shadow of authority from that, which is held to be the fountain of all power, Adam's private dominion and paternal jurisdiction; so that he that will not give just occasion to think that all government in the world is the product only of force and violence, and that men live together by no other rules but that of beasts, where the strongest carries it, and so lay a foundation for perpetual disorder and mischief, tumult, sedition and rebellion, (things that the followers of that hypothesis so loudly cry out against) must of necessity find out another rise of government, another original of political power, and another way of designing and knowing the persons that have it, than what Sir Robert Filmer hath taught us.