Recognizing Stances in Online Debates Debate: iPhone vs. Blackberry iPhone of course. Blackberry is now for the senior businessmen market! The iPhone incarnate

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  • Recognizing Stances in Online Debates Debate: iPhone vs. Blackberry iPhone of course. Blackberry is now for the senior businessmen market! The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology. The iPhone can reach a very diversified clientele ACL 2009 swapna@cs.pitt.edu
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  • Recognizing Stances in Online Debates Debate: iPhone vs. Blackberry iPhone of course. Blackberry is now for the senior businessmen market! The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology. The iPhone can reach a very diversified clientele ACL 2009 swapna@cs.pitt.edu Side Classification: pro-iPhone stance
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  • Recognizing Stances in Online Debates Debate: iPhone vs. Blackberry iPhone of course. Blackberry is now for the senior businessmen market! The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology. The iPhone can reach a very diversified clientele ACL 2009 swapna@cs.pitt.edu Arguing why their stance is correct
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  • Recognizing Stances in Online Debates Debate: iPhone vs. Blackberry iPhone of course. Blackberry is now for the senior businessmen market! The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology. The iPhone can reach a very diversified clientele ACL 2009 swapna@cs.pitt.edu Justifying why the opposite side is not good
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  • ACL 2009 swapna@cs.pitt.edu http://www.convinceme.net/
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  • ACL 2009 swapna@cs.pitt.edu http://www.convinceme.net/ Side Classification: pro-iPhone stance Side Classification: pro- Blackberry stance Side Classification: pro-iPhone stance Topics: 1.iPhone 2.Blackberry Sides/ Stances: 1.Pro-iPhone 2.Pro-Blackberry Dual-topic, Dual-sided debates regarding Named Entities
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  • Goal Debate stance recognition using opinion analysis Learn debating preferences from the web Exploited in an unsupervised approach Combines the individual pieces of information to classify the overall stance ACL 2009 swapna@cs.pitt.edu
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  • Challenges ACL 2009 swapna@cs.pitt.edu The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology
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  • Challenges ACL 2009 swapna@cs.pitt.edu The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology Positive and negative opinions are employed to argue for a side Side Classification: pro-iPhone stance
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  • Challenges ACL 2009 swapna@cs.pitt.edu The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology Positive and negative opinions are employed to argue for a side Opinions towards both topics within a post Side Classification: pro-iPhone stance
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  • Challenges ACL 2009 swapna@cs.pitt.edu The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology Positive and negative opinions are employed to argue for a side Opinions towards both topics within a post Side Classification: pro-iPhone stance + towards iPhone - towards Blackberry
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  • Challenges ACL 2009 swapna@cs.pitt.edu The iPhone incarnate the 21st century whereas Blackberry symbolizes an outdated technology Positive and negative opinions are employed to argue for a side Opinions towards both topics within a post Side Classification: pro-iPhone stance + towards iPhone - towards Blackberry We need to consider not only positive and negative opinions but also what they are about (targets)
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  • Challenges Pro-blackberry The Pearl does music and video nicely First, you still can't beat the full QWERTY keyboard for quick, effortless typing. Pro-iPhone Well, Apple has always been a well known company. Its MAC OS is also a unique thing. ACL 2009 swapna@cs.pitt.edu
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  • Challenges Pro-blackberry The Pearl does music and video nicely First, you still can't beat the full QWERTY keyboard for quick, effortless typing. Pro-iPhone Well, Apple has always been a well known company. Its MAC OS is also a unique thing. Debate topics are evoked in a variety of ways: Opinions explicitly toward the named topics are not enough Type of Blackberry Feature of Blackberry Maker of iPhone Feature of iPhone ACL 2009 swapna@cs.pitt.edu
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  • Challenges Pro-blackberry The Pearl does music and video nicely First, you still can't beat the full QWERTY keyboard for quick, effortless typing. Pro-iPhone Well, Apple has always been a well known company. Its MAC OS is also a unique thing. We need to consider not only opinions towards topics, But also opinions towards aspects ACL 2009 swapna@cs.pitt.edu
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  • Challenges Pro-blackberry The Pearl does music and video nicely First, you still can't beat the full QWERTY keyboard for quick, effortless typing. Pro-iPhone Well, Apple has always been a well known company. Its MAC OS is also a unique thing. We need to consider not only opinions towards topics, But also opinions towards aspects Unique Aspects ACL 2009 swapna@cs.pitt.edu
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  • Challenges iPhone and Blackberry, both Have e-mail facilities Can be used to take photos Operate on batteries Etc. Both sides share aspects ACL 2009 swapna@cs.pitt.edu
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  • Challenges I love the ability to receive emails from my work account ACL 2009 swapna@cs.pitt.edu People expressing positive opinions regarding emails (generally) prefer Blackberry
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  • Challenges I love the ability to receive emails from my work account ACL 2009 swapna@cs.pitt.edu Certain shared aspects may be perceived to be better in one side Email on Blackberry Value for shared aspects depends on personal preferences Emailing pro-Blackberry people will argue via Email+ That is, Email+ is often a strategy for arguing for the pro-Blackberry stance. Or, Browsing+ for iPhone
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  • Challenges I love the ability to receive emails from my work account ACL 2009 swapna@cs.pitt.edu We need to find what a preference/dislike for an individual target means towards the debate stance as a whole
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  • Challenges While the iPhone looks nice and does play a decent amount of music, it can't compare in functionality to the BB. Concessionary opinions can be misleading ACL 2009 swapna@cs.pitt.edu Side Classification: pro- Blackberry stance
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  • Challenges While the iPhone looks nice and does play a decent amount of music, it can't compare in functionality to the BB. ACL 2009 swapna@cs.pitt.edu Side Classification: pro- Blackberry stance We need to detect and handle concessionary opinions
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  • Challenges: Summary For debate stance recognition we need to: Consider not only positive and negative opinions, but also what they are about (targets). Consider not only opinions towards topics, but also opinions towards aspects Find what a preference/dislike for an individual target means towards the debate stance as a whole Detect and handle concessionary opinions ACL 2009 swapna@cs.pitt.edu
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  • Challenges: Summary For debate stance recognition we need to: Consider not only positive and negative opinions, but also what they are about (targets). Consider not only opinions towards topics, but also opinions towards aspects Find what a preference/dislike for an individual target means towards the debate stance as a whole Detect and handle concessionary opinions ACL 2009 swapna@cs.pitt.edu Turney, 2002; Pang et al, 2002; Dave et al, 2003; Yu and Hatzivassiloglou, 2003, Pang and Lee 2005, Wilson et al 2005, Goldberg and Zhu, 2006, Kim and Hovy 2006
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  • Challenges: Summary For debate stance recognition we need to: Consider not only positive and negative opinions, but also what they are about (targets). Consider not only opinions towards topics, but also opinions towards aspects Find what a preference/dislike for an individual target means towards the debate stance as a whole Detect and handle concessionary opinions ACL 2009 swapna@cs.pitt.edu Hu and Liu, 2004; Popescu and Etzioni., 2005; Bloom et al. 2007, Stoyanov and Cardie 2008; Xu et al., 2008
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  • For debate stance recognition we need to: Consider not only positive and negative opinions, but also what they are about (targets). Consider not only opinions towards topics, but also opinions towards aspects Find what a preference/dislike for an individual target means towards the debate stance as a whole Detect and handle concessionary opinions Our Approach ACL 2009 swapna@cs.pitt.edu
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  • For debate stance recognition we need to: Consider not only positive and negative opinions, but also what they are about (targets). Consider not only opinions towards topics, but also opinions towards aspects Find what a preference/dislike for an individual target means towards the debate stance as a whole Detect and handle concessionary opinions Our Approach ACL 2009 swapna@cs.pitt.edu Adopting from previous work, Opinion-target pairing using Opinion Lexicons and Syntactic rules
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  • For debate stance recognition we need to: Consider not only positive and negative opinions, but also what they are about (targets). Consider not only opinions towards topics, but also opinions towards aspects Find wha