Engin’s PhD project focused on viewpoint diversity, online polarization and value sensitive design. Critics argued that opaque filtering algorithms used by online web services such as Google or Facebook are trying to improve accuracy at the expense of diversity, leading to so-called filter bubbles. As a result, users never see the other side of an argument, viewpoint diversity diminishes and civic discourse is undermined. Engin’s thesis first analyzes internal processes and factors in online web services that might cause filter bubbles. Later, it extends the metrics used in viewpoint diversity research and presents the results of an empirical study for Dutch and Turkish Twitter users. The thesis also analyzes software tools and design attempts to combat filter bubbles. It demonstrates that almost all of the tools implement norms required by two popular democracy models. The thesis argues that democracy is essentially a contested concept, and that other less popular democracy models should be included in the design of such tools as well.
Engin is the winner of NWO’s Mozaiek 2010 grant. Engin completed both his MSc and BSc degrees in Computer Science, specializing in web based applications (Delft, 2008). Before joining TU Delft as a PhD student, he was working as a search quality associate in Google.
Scientific publications (selection)
- Bozdag E. and van den Hoven J. 2015. Bursting the Filter Bubble: Democracy and Design. Ethics and Information Technology (forthcoming)
- Bozdag E., Gao Q., Houben G.J., Warnier M. Does Offline Political Segregation Affect the Filter Bubble? An Empirical Analysis of Information Diversity for Dutch and Turkish Twitter Users. Computers in Human Behavior, Elsevier ScienceDirect (2014) available online
- Puschmann C. and Bozdag E. 2014. Staking out the unclear ethical terrain of online social experiments. Internet Policy Review. Volume 3, Issue 4. Published on 26 Nov 2014. 10.14763/2014.4.338 click to open pdf
- Bozdag E. and Gao Q. An empirical research design for analyzing information diversity in Twitter for Dutch and Turkish users. In proceedings of ETHICOMP 2013, University of Southern Denmark, Kolding, Denmark, 2013.
- Bozdag E. and van de Poel I. Designing for diversity in online personalization systems. In proceedings of Technology Management for Emerging Technologies Conference (PICMET), San Jose, USA, 2013.
- Bozdag E. Bias in Algorithmic Filtering and Personalization. Ethics and Information Technology. forthcoming.
- Bozdag E., Gao Q., Warnier M. and Houben G. Analyzing viewpoint diversity in Twitter. Proceedings of "Designing Social Media for Change" Workshop, The ACM SIGCHI Conference on Human Factors in Computing Systems (CHI). Paris, 2013.
- Bozdag, Engin. 2013. Bias in Algorithmic Filtering and Personalization. In Ethics and Information Technology. September 2013, Volume 15, Issue 3, pp 209-227
- Bozdag, E., and Timmermans, J. 2011. "Values in the Filter Bubble: Ethics of Personalization Algorithms in Cloud Computing". In Proceedings of the 13th IFIP TC13 Conference on Human-Computer Interaction (Interact), Workshop on Values in Design - Building Bridges between HCI, RE and Ethics, Lisbon, Portugal.
- Timmermans, J., Stahl, B.C., Ikonen V., and Bozdag, E., 2010. "The Ethics of Cloud Computing: A Conceptual Review". Cloud Computing, HCI, & Design: Sustainability and Social Impacts, 2nd IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2010), Indianapolis, USA.
- Engin Bozdag, Ali Mesbah, and Arie van Deursen. Performance testing of data delivery techniques for AJAX applications. In Journal of Web Engineering (JWE), volume 8, pages 287. 315, 2009.
- Ali Mesbah, Engin Bozdag, and Arie van Deursen. Crawling AJAX by inferring user interface state changes. In 8th International Conference on Web Engineering (ICWE08), 2008.
- Engin Bozdag and Arie van Deursen. An adaptive push/pull algorithm for AJAX applications. In Third International Workshop on Adaptation and Evolution in Web Systems Engineering (AEWSE 08), July 2008.
- Engin Bozdag, Ali Mesbah, and Arie van Deursen. A comparison of push and pull techniques for AJAX. In Proceedings of the 9th IEEE International Symposium on Web Site Evolution (WSE), pages 15- 22. IEEE Computer Society, 2007