TAILIEUCHUNG - Báo cáo khoa học: "A System for Detecting Subgroups in Online Discussions"

We present Subgroup Detector, a system for analyzing threaded discussions and identifying the attitude of discussants towards one another and towards the discussion topic. The system uses attitude predictions to detect the split of discussants into subgroups of opposing views. The system uses an unsupervised approach based on rule-based opinion target detecting and unsupervised clustering techniques. The system is open source and is freely available for download. | Subgroup Detector A System for Detecting Subgroups in Online Discussions Amjad Abu-Jbara EECS Department University of Michigan Ann Arbor MI USA amjbara@ Dragomir Radev EECS Department University of Michigan Ann Arbor MI USA radev@ Abstract We present Subgroup Detector a system for analyzing threaded discussions and identifying the attitude of discussants towards one another and towards the discussion topic. The system uses attitude predictions to detect the split of discussants into subgroups of opposing views. The system uses an unsupervised approach based on rule-based opinion target detecting and unsupervised clustering techniques. The system is open source and is freely available for download. An online demo of the system is available at http SubgroupDetector 1 Introduction Online forums discussing ideological and political topics are common1. When people discuss a controversial topic it is normal to see situations of both agreement and disagreement among the discussants. It is even not uncommon that the big group of discussants split into two or more smaller subgroups. The members of each subgroup have the same opinion toward the discission topic. The member of a subgroup is more likely to show positive attitude to the members of the same subgroup and negative attitude to the members of opposing subgroups. For example consider the following snippet taken from a debate about school uniform 1 etc 133 1 Discussant 1 I believe that school uniform is a good idea because it improves student attendance. 2 Discussant 2 I disagree with you. School uniform is a bad idea because people cannot show their personality. In 1 the writer is expressing positive attitude regarding school uniform. The writer of 2 is expressing negative attitude disagreement towards the writer of 1 and negative attitude with respect to the idea of school uniform. It is clear from this short .

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