Electrical Engineering and Computer Science


Faculty Candidate Seminar & Natural Language Processing Seminar

Online social interactions: a lens on humans and a world for humans

Chenhao Tan


PhD Candidate
Cornell
 
Monday, April 11, 2016
4:00pm - 5:00pm
1690 Beyster

Add to Google Calendar

About the Event

Online social interactions have become an integral part of people's lives, e.g., presidential candidates use Facebook and Twitter to engage with the public, programmers rely on Stackoverflow to write code, and various communities have been forming online. This unprecedented amount of social interaction offers tremendous opportunities to understand human behavior. Such an understanding can induce significant social impact, ranging from influencing election outcomes to better communication for everyone.

My research leverages newly available massive datasets of social interactions to understand human behavior and predict human decisions. These results can be used to build or improve socio-technical systems. In this talk, I will explain my research at both micro and macro levels. At the micro level, I investigate the effect of wording in message sharing via natural experiments. I develop a classifier that outperforms humans in predicting which tweet will be retweeted more. At the macro level, I examine how users engage with multiple communities and find that, surprisingly, users continually explore new communities on Reddit. Moreover, their exploration patterns in their early ``life'' can be used to predict whether they will eventually abandon Reddit. I will finish with some discussion of future research directions in understanding human behavior.

Biography

Chenhao Tan is a Ph.D. Candidate in the Department of Computer Science at Cornell University. He earned Bachelor degrees in Computer Science and in Economics from Tsinghua University. His research spans a wide range of topics in social computing. He has published papers primarily at ACL and WWW, and also at KDD, WSDM, ICWSM, etc. His work has been covered by many news media outlets, such as the New York Times and the Washington Post. He also won a Facebook fellowship and a Yahoo! Key Scientific Challenges award.

Additional Information

Sponsor(s): CSE

Open to: Public