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I'm a Professor of Computer Science at Wellesley College, studying the power of crowdsourcing in online social networks, especially related to the propagation of information and misinformation, prediction of political events, and in developing tools that help users evaluate the trustworthiness of information. In the past, I have done research in Visualization, Parallel Computing, Image Dithering and CS Education.

More information about my current work is in "Separating Truth From Lies" by the Project Information Lieracy.

I am currently the Faculty Director of the Albright Institute for Global Affairs, and a Visiting Research Fellow at the Center for Technology and Global Affairs at the University of Oxford, UK.

I Studied Mathematics at the University of Athens and Computer Science at Brown. I received my M.Sc. and Ph.D. in Computer Science from Dartmouth, and have been a visiting scientist at MIT, the Sydney University in Australia, and at Harvard. I currently work in the Computer Science department at Wellesley College, where I founded and co-direct the Media Arts and Sciences program, and also at Harvard, where I am an Affiliate at the Center for Research on Computation and Society (CRCS).

I am the Faculty Director of the Scholarly Communications Group that oversees the implementation of the Open Access Policy at Wellesley. In terms of professional associations, I'm a senior member of the ACM, and a member of LACS, IEEE Computer Society, SIGWEB, SIGCSE and SIGACT's Electronic Publication Board. I also serve on the program committees for the WWW (Social Networks Track), AAAI-Web, WEBIST, ICWI and ICWSM conferences. I am currently on the Advisory Board of XRDS and a Guest Editor for the special issue of the Internet Research Journal on "The Power of Prediction with Social Media" and of the Special Issue of the Journal German AI Journal (Kunstliche Intelligenz) on Social Media.

I currently serve as a co-Chair of the Journalism, Misinformation, and Fact Checking Track of The Web Conference (aka WWW2018) to be held in Lyon, France on April 23-27, 2018.

In the past, I was a member of the Computing Research Association's Board of Directors, and the Chief Technology Officer of a biotech company, and lead it to gain FDA approval for computerized tests measuring the symptoms of mental disorders, and a Research Associate at the Developmental Biopsychiatry Research Program at McLean Hospital, Harvard Medical School.

My research has been supported by the National Science Foundation, Brachman-Hoffman Fellowships, and Wellesley College.

On a personal note, I maintain the website metaxa.net which hosts the book "History of the Metaxa Family from 1081 until 1864" (in Greek) by Epaminondas Metaxas, MD (Athens, 1893)