Performance issues and error analysis in an open-domain question answering system

Dan Moldovan, Marius Paşca, Sanda Harabagiu, Mihai Surdeanu

Research output: Contribution to journalArticlepeer-review

161 Scopus citations


This paper presents an in-depth analysis of a state-of-the-art Question Answering system. Several scenarios are examined: (1) the performance of each module in a serial baseline system, (2) the impact of feedbacks and the insertion of a logic prover, and (3) the impact of various retrieval strategies and lexical resources. The main conclusion is that the overall performance depends on the depth of natural language processing resources and the tools used for answer finding.

Original languageEnglish (US)
Pages (from-to)133-154
Number of pages22
JournalACM Transactions on Information Systems
Issue number2
StatePublished - Apr 2003


  • Natural language applications
  • Performance analysis
  • Question answering
  • Text retrieval

ASJC Scopus subject areas

  • Information Systems
  • Business, Management and Accounting(all)
  • Computer Science Applications


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