• Korean Journal of Cognitive Science
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• v.21 no.2
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• pp.253-282
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• 2010

Two experiments were conducted to explore the effects of anaphora and demonstrative ellipsis on reference resolution. This study assumed that two type of ellipsis could be sensitive to antecedents' saliency: the reverse typicality and mention order of antecedents. The muti-task approach measured the antecedent's activation level and processing load for the conflict resolution of theories of anaphoric resolution. In Experiment 1, using ellipsis for anaphora, participants read a series of sentence pairs by self-paced and performed a probe recognition test. The results showed the main effects of antecedent's typicality and mention order in both tasks. In Experiment 2, using noun phrase without demonstrative for anaphora, participants read a series of sentence pairs by self-paced and performed a probe recognition test. The results showed main effects of mention order of antecedents for probe recognition task only. The first antecedent was recognized faster than the second one. The results of two experiments suggested that anaphora type and antecedent's saliency were dynamically interact in reference resolution for Korean.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.10
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• pp.1005-1009
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• 2010

Elliptical and anaphoric utterances occur frequently during spoken dialogue. Because discourse analysis rests on the basic premise that linguistic items cannot be understood without reference to the context, ellipsis and anaphora resolution plays an important role in discourse analysis. In this paper, we present a spoken dialogue system improving the robustness at dialogue level based on discourse analysis, such as anaphora and ellipsis resolution. The applicability and effectiveness of the proposed method is evaluated in the TV domain.

• Annual Conference on Human and Language Technology
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• 1997.10a
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• pp.347-352
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• 1997

대용(anaphora)과 생략(.ellipsis)지을 포함한 지시 해결(reference resolution)은 자연어 처리에 있어서 꼭 해결하고 넘어가야 할 문제이며 지시어가 가리키는 피지시어를 올바르게 찾아내는가의 여부가 자연어처리 시스템의 성패를 가름하는 중요한 요소가 된다해도 과언이 아니다. 본 논문에서는 한국어 대용과 생략을 해결하기 위한 기제로서 센터링 이론이 적합한가를 검토하고 나아가 언어에 따라서 다르게 제안된 Cf 목록의 순서를 한국어의 언어특성에 맞게 결정하는 기법을 제안한다. 센터링 이론에서 각 개별언어 간의 차이가 가장 두드러지게 나타나는 부분은 Cf 목록을 구성하는 요소들의 순서이다. 여기에서는 한국어와 언어적인 특성이 유사한 일본어를 대상으로 제안된 순서를 한국어에도 그대로 적용될 수 있는지 검토하고 문제점을 지적함과 동시에 개선 방안을 아울러 살펴보고자 한다.

• Korean Journal of Cognitive Science
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• v.11 no.1
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• pp.9-24
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• 2000

This paper analyzes the distribution and classification of unrealized arguments of a predicate often called zero pronouns. in spoken Korean. Based on the transcript of a one-hour-Iong dialogue. recorded from public radio stations. I present the statistical data on argument ellipsis in Korean with respect to the frequency of zero ronouns as well as the nature of their antecedents. I go further to review some of the previous efforts to identify the discourse- theoretic functions of zero-pronouns in the framework of Centering Theory. and propose that the zero-pronouns in spoken Korean be divided into center-insensitive vs. center-sensitive classes. I also point out a couple of language-particular idiosyncrasies found in Korean, such as morpho-syntactic elements and encyclopaedic knowledge. that interact with center management in on-going discourse and often lead to difficulties in applying the centering rules and constraints to Korean.

• Korean Journal of Cognitive Science
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• v.11 no.1
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• pp.81-92
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• 2000

Elliptical fragments are common in natural language dialogues between humans. Since most elliptical fragments should be interpeted within the context. it is not easy for computers to recognize the speaker's intention from the elliptical fragments. In t this paper we propose a model to recognize speaker's intention from elliptical fragments 1 in Korean by expanding the tripartite plan-based model proposed by Lambert. We add new discourse recipes to define user's discourse actions through elliptical fragments. In order to use plan inference process. we must represent utterances as actions. e. g .. r e elliptical fragments are represented as surface speech acts. In surface speech act representation. we include the information of 'Josa' (case markers in Korean), because t the information of 'Josa' plays a very important role in analysing speakers' intention in Korean. Finally. by using an object and discourse focus theory, the system can recognize the intention that a user is trying to compare between two plans by uttering elliptical fragments