One click one revisited: Enhancing evaluation based on information units

Tetsuya Sakai*, Makoto P. Kato

*この研究の対応する著者

研究成果

3 被引用数 (Scopus)

抄録

This paper extends the evaluation framework of the NTCIR-9 One Click Access Task (1CLICK-1), which required systems to return a single, concise textual output in response to a query in order to satisfy the user immediately after a click on the SEARCH button. Unlike traditional nugget-based summarisation and question answering evaluation methods, S-measure, the official evaluation metric of 1CLICK-1, discounts the value of each information unit based on its position within the textual output. We first show that the discount parameter L of S-measure affects system ranking and discriminative power, and that using multiple values, e.g. L = 250 (user has only 30 seconds to view the text) and L = 500 (user has one minute), is beneficial. We then complement the recall-like S-measure with a simple, precision-like metric called T-measure as well as a combination of S-measure and T-measure, called S#. We show that S# with a heavy emphasis on S-measure imposes an appropriate length penalty to 1CLICK-1 system outputs and yet achieves discriminative power that is comparable to S-measure. These new metrics will be used at NTCIR-10 1CLICK-2.

本文言語English
ホスト出版物のタイトルInformation Retrieval Technology - 8th Asia Information Retrieval Societies Conference, AIRS 2012, Proceedings
ページ39-51
ページ数13
DOI
出版ステータスPublished - 2012 12 31
外部発表はい
イベント8th Asia Information Retrieval Societies Conference, AIRS 2012 - Tianjin, China
継続期間: 2012 12 172012 12 19

出版物シリーズ

名前Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
7675 LNCS
ISSN(印刷版)0302-9743
ISSN(電子版)1611-3349

Conference

Conference8th Asia Information Retrieval Societies Conference, AIRS 2012
国/地域China
CityTianjin
Period12/12/1712/12/19

ASJC Scopus subject areas

  • 理論的コンピュータサイエンス
  • コンピュータ サイエンス(全般)

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