My research areas are artificial intelligence and natural language processing (NLP). My research with students and colleagues has been in discourse processing, pragmatics, word-sense disambiguation, and probabilistic classification in NLP. A major concentration of our research is "subjectivity analysis", recognizing and interpretating expressions of opinions and sentiments in text, to support NLP applications such as question answering, information extraction, text categorization, and summarization.

A new version of the MPQA corpus was released January 2009 which includes attitude annotations (such as positive and negative sentiments and arguing) as well as target span annotations. Both versions are available at the link below.

Click here for publications

Bibliography of work in subjectivity and sentiment analysis: .bib file and .html table

The MPQA opinion annotated corpus, OpinionFinder system and our subjectivity lexicon including prior polarity/sentiment annotations are available at http://www.cs.pitt.edu/mpqa

The gold standard manual subjectivity sense annotations used in Wiebe and Mihalcea ACL 2006 are available here. The definitions of those words from WordNet 2.0 are here. The larger set of annotations used in Gyamfi, Wiebe, Mihalcea NAACL 2009 will be available soon.

Click here for tutorials and extended talks.

CS1502: Formal Methods in Computer Science

Recent program committees : ACL-IJCNLP09 (Program Co-Chair); EMNLP09; ACL08 (Area Chair); AAAI08; COLING08; EMNLP07 (Area Chair); ACL 2007 Workshop on Frontiers in Linguistically Annotated Corpora (Co-Chair); ACL07; IJCAI07; AAAI07; NAACL07; International Conference on Weblogs and Social Media (ICWSM) 2007; ACL07 Student Research Workshop.

Recent Invited Talks: FLAIRS, May 2009; University of Edinburgh, June 2009; University of Osnabruck, June 2009.

Theresa Wilson graduated with her PhD, April 2008. Her dissertation is entitled Fine-Grained Subjectivity Analysis.

CERATOPS: Center for the Extraction and Summarization of Events and Opinions from Text. Department of Homeland Security.

Toward a Comprehensive Linguistic Annotation of Language. National Science Foundation.

NLP Foundational Studies & Ontologies for Syndromic Surveillance from Emergency Department Reports. National Library of Medicine.

Subjectivity and Word Sense. National Science Foundation.

Click here for professional activities.

Cem Akkaya
Yaw Anti Gyamfi
Swapna Somasundaran

Pittsburgh Technology Council Career Center -- A good place to look for Computer Science jobs in Pittsburgh

SentimentAI Yahoo! group

Richard A. Wiebe New York State Senate Public Service Fellowship

Historic Pittsburgh Image Collections