tailieunhanh - Báo cáo khoa học: "Don’t worry about metaphor: affect extraction for conversational agents"

We demonstrate one aspect of an affectextraction system for use in intelligent conversational agents. This aspect performs a degree of affective interpretation of some types of metaphorical utterance. of metaphor, with a significant degree of linguistic open-endedness. Also, note that our overarching research aim is to study metaphor as such, not just how it arises in e-drama. This increases our need for systematic, open-ended methods. | Don t worry about metaphor affect extraction for conversational agents Catherine Smith Tim Rumbell John Barnden Bob Hendley Mark Lee Alan Wallington School of Computer Science University of Birmingham Birmingham B15 2TT UK Abstract We demonstrate one aspect of an affectextraction system for use in intelligent conversational agents. This aspect performs a degree of affective interpretation of some types of metaphorical utterance. 1 Introduction Our demonstration is of one aspect of a system for extracting affective information from individual utterances for use in text-based intelligent conversational agents ICAs . Affect includes emo-tions moods such as embarrassment hostility and evaluations of goodness importance etc. . Our own particular ICA Zhang et al. 2006 is for use in an e-drama system where human users behave as actors engaged in unscripted role-play. Actors type in utterances for the on-screen characters they control to utter via speech bubbles . Our ICA is another actor controlling a bit-part character. Through extracting affect from other characters utterances it makes responses that can help keep the conversation flowing. The same algorithms are also used for influencing the characters gesturing when a 3D animation mode is used . The system aspect demonstrated handles one important way in which affect is expressed in most discourse genres namely metaphor. Only a relatively small amount of work has been done on computational processing of metaphorical meaning for any purpose let alone in ICA research. Major work apart from ours on metaphorical-meaning computation includes Fass 1997 Hobbs 1990 Martin 1990 Mason 2004 Narayanan 1999 Veale 1998 . The e-drama genre exhibits a variety of types 37 of metaphor with a significant degree of linguistic open-endedness. Also note that our overarching research aim is to study metaphor as such not just how it arises in e-drama. This increases our need for systematic open-ended methods. 2 .

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