My main area of research is computational linguistics, specifically the relationship between intonation and discourse. My current interests include emotional speech (including deceptive and charismatic speech); intonation variation in spoken dialogue systems; speech synthesis; speech search and summarization over large corpora of broadcast news and voicemail; and interfaces to speech corpora. Below are some of my papers. A complete list of publications can be found in my resume; if you have trouble finding any papers, please send me email. Slides from a tutorial with a bibliography are also available for download. Also, I have written several general surveys of work on intonational meaning and text-to-speech synthesis, including "Communication and Prosody" in Speech Communication 36 (2002), an article in the Handbook of Pragmatics, "Pragmatics and Intonation," (2003), and a section of the second edition of the Encyclopedia of Language and Linguistics on "Speech Synthesis, Prosody" (final draft). See http://www.cs.columbia.edu/speech/papers for a fuller listing of publications from the Speech Lab. For a list of current and past collaborators on Columbia projects, and a fuller description of these projects, please see our lab projects page.