NICT sponsored research

"Evaluating Credibility of Web Information"

Subject-B:　Research on Temporal Analysis of Semantic Contents

Yokohama National University

YNU's Research Contribution: Statement space Arrangement

We aim to generate survey reports, which include relations between statements such as semantic relations on a statement map by NAIST and time relations analyzed by NEC, for helping a user understand how to interpret these relations. Here, the help for interpretation means guides for supporting a user's judgment as follows. For example, if there are two opposing statements such as "Diesel engines are harmful to the environment" and "Diesel engines are not harmful to the environment," the guides help a user judge which is the case: the case that one of the statements is wrong or one that the statements can coexist under certain situations. In addition to summary for overview of noteworthy argument points, the guides for interpretation, which are also other types of summaries, are useful for a user's judgment on the credibility of information. We study methods for supporting a user's interpretation in order to broaden a user's horizons and to promote his/her media literacy.

Survey Reports for a User's Judgment on the Credibility of Information

A survey report roughly consists of the following two types of summaries.

• Summary for Overview: important argument points in a topic are fairly presented in order to help a user understand all over the topic.
• Summary for Interpretation: noteworthy conflict relations and guides for interpreting them are presented in order to help a user understand each argument point. Mediatory summaries described later are included here.

Mediatory Summary

In general, if a statement is opposed to another statement, the credibility of either statement will decrease because we tend to think that either of these statements is wrong. However, some of the statements that appeared to contradict each other at first glance are not logically contradictory and can coexist under a certain situation. Therefore, we focus on the coexistence of these opposing statements, and present guides to mediate the opposing statements by extracting description that include the situation and contexts of the coexistence. We define this type of guides as mediatory summary.

However, if any description for mediation cannot be found, description that includes many reasons and a sender are presented as guides in order to help a user judge contradiction of the reasons and reliability of the statements.

List of Publications

• Masahiro Nakano, Hideyuki Shibuki, Rintaro Miyazaki, Madoka Ishioroshi, Tatsunori Mori, "Experiment and analysis of manual summarization aiming at automated summarization that supports the judgment of the information credibility", Information Processing Society of Japan (IPSJ) SIG Technical Report 2008-NL-187, 107-114, September, 2008. (In Japanese).
• Rintaro Miyazaki, Tatsunori Mori, "Creation of a Corpus for Sentiment Analysis based on Product Reviews and Analysis of its Features", Information Processing Society of Japan (IPSJ) SIG Technical Report 2008-NL-187, September, 2008. (In Japanese).
• Hideyuki Shibuki, Masahiro Nakano, Rintaro Miyazaki, Madoka Ishioroshi, Takako Suzuki, Tatsunori Mori, "Basic Study on the Summarization for a User's Judgment on the Credibility of Information", The 15th Annual Meeting of the Association for Natural language Processing, pp.136-139, March, 2009. (In Japanese).
• Rintaro Miyazaki, Ryo Momose, Hideyuki Shibuki, Tatsunori Mori, "Using Web Page Layout for Extraction of Sender Names", Third International Universal Communication Symposium (IUCS2009), December, 2009.