1 / 6

Attributions and Private States

Attributions and Private States. Jan Wiebe (U. Pittsburgh) Theresa Wilson (U. Pittsburgh) Claire Cardie (Cornell U.). Terminology. Private states : opinions, emotions, evaluations, speculations, etc.

sorena
Download Presentation

Attributions and Private States

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Attributions and Private States Jan Wiebe (U. Pittsburgh) Theresa Wilson (U. Pittsburgh) Claire Cardie (Cornell U.)

  2. Terminology • Private states: opinions, emotions, evaluations, speculations, etc. • States not open to objective observation or verification: “a person may be observed to assert that God exists, but not to believe that God exists. Belief is this sense ‘private’”[Quirk etal. 1985] • Following literary theorists such as Banfield (1982): we use the term subjectivity for linguistic expressions of private states

  3. “The U.S. fears a spill-over,” said Xirao-Nima. “The report is full of absurdities,” Xirao-Nima said. Objective speech event source: <writer> implicit: true Objective speech event source: <writer> implicit: true Objective speech event text anchor: said source: <writer,nima> Direct subjective text anchor: said source: <writer,nima> intensity: high expression intensity: neutral attitude: negative target: the report Direct subjective text anchor: fears source: <writer,nima,US> intensity: medium expression intensity: medium Expressive subjective element text anchor: full of absurdities source: <writer,nima> intensity: high

  4. MPQA Opinion Corpus • English language versions of articles from theworld press. 187 news sources. • 708 docs 15,644 sentences • [385 docs expression level polarity] • nrrc.mitre.org/NRRC/publications.htm • Est. 415 hours to annotate 100K words • Text anchor agreement: 72-82% • Subjective/objective agreement: .77-.89 Kappa [Wilson & Wiebe SIGdial-03; Wilson, Wiebe, Hwa AAAI-04] [Wiebe, Wilson, Cardie LRE 1(2) 2005]

  5. Recent Extensions I think people are happy because Chavez has fallen. explicit private state span: think source: <writer, I> attitude: explicit private state span: are happy source: <writer, I, People> attitude: attitude span: think type: positive arguing intensity: medium target: attitude span: are happy type: positive attitude intensity: medium target: inferred attitude span: are happy because Chavez has fallen type: negative attitude intensity: medium target: target span: people are happy because Chavez has fallen target span: Chavez has fallen target span: Chavez

  6. Applications • Multi-perspective QA • Information extraction • Tracking attitudes toward topics and events • Classifying reviews • Analyzing product reputations • Recognizing hostile messages [Acknowledgments: Northeast Regional Research Center; ARDA AQUAINT; NSF]

More Related