Picture of Tasos Spiliotopoulos
I’m a PhD candidate in Human-Computer Interaction at the University of Madeira in Portugal under the supervision of Ian Oakley. I hold a Portuguese National Science Foundation (FCT) PhD Scholarship to investigate the application of social network analysis techniques for studying behavior in social network sites. I also collaborate with the Madeira Interactive Technologies Institute, under the Carnegie Mellon|Portugal partnership, and the Interactions Lab at UNIST. Prior to this, I was a member of the Information Systems Laboratory Research Group at the University of Athens in Greece, and worked as a freelance software developer and usability specialist. I hold a BSc in Computer Science from the University of Leicester in the UK and an MSc in Advanced Information Systems from the University of Athens.

Key topics in my PhD research include computational social science, social network analysis, privacy, usability, location sharing and computer-mediated communication. Areas that my research has focused in the past include human-centered design, locative media, universal design and web accessibility, business entrepreneurship and employability, teleworking and e-government services.


- 07/2014: I will be presenting our paper on Facebook tie strength at the PCI 2014 conference.
- 07/2013: “How Much Does Facebook Really Know About You?”. Our work was featured on the CrowdResearch blog.
- 05/2013: I presented our paper on Twitter hashtag networks at the Hybrid City conference in Athens, Greece.
- 12/2012: Our paper “Understanding Motivations for Facebook Use: Usage Metrics, Network Structure, and Privacy” has been accepted at CHI 2013! On a related note, I’m very happy to also SV for the conference! Update: Our experience report has also been accepted at the RepliCHI 2013 workshop at CHI 2013! Update 2: Unfortunately, I will miss the conference due to a not fully recovered broken leg. Bummer. Update 3: Our paper received a CHI 2013 RepliCHI award!
- 10/2012: Our paper “Uses & Gratifications of a Facebook Media Sharing Group” has been accepted at CSCW 2013!
- 08/2012: We are running a new study on Facebook friendships. Click here to go to the study description page. Update: This survey is now closed. Thanks to everyone who participated.
- 02/2012: I presented my position paper “Applications of Social Network Analysis for User Modeling” at the International Workshop on User Modeling from Social Media at IUI 2012 in Lisbon.
- 01/2012: We are running a study on the usage of social network sites. Please help us in our research and complete this short survey. Update: This survey is now closed. A big thanks to all the participants.
- 10/2011: I gave a talk titled: “Studying social behavior through the computational modeling of online social networks” at M-ITI. Here is the abstract.
- 09/2011: I’m a student volunteer at ECSCW ’11 in Aarhus, Denmark. If you’re around, don’t forget to say Hi!
Update: Here is the Twitter network graph of the conference.
- 06/2011: I’m spending the summer visiting KAIST in South Korea.