Kim, Kyu-hyun. 2004. A Conversation Analysis of Korean Sentence-Ending Modal Suffixes -ney, -kwun(a), and -ta: Noticing as a Social Action. Sociolinguistic Journal of Korea, 12(1). Drawing upon H. S. Lee's (1993) cognitively-oriented research on the functions of three sentence-ending modal suffixes in Korean that are used to express newly perceived information, -ney, -kwun(a), and -ta, this study analyzes the distinct meanings of these suffixes from a conversation-analytic perspective (Sacks et al. 1974). The suffix -ney is used in the context in which the speaker notices a referent/event and makes an assessment on the spot in such a way that the speaker's stance displayed through the action is formulated as something that is to be immediately oriented to and contingently taken up by the hearer. In contrast, the suffix -kwun(a) is used when the speaker is mainly oriented to displaying a stance congruent with the prior talk. The action it organizes is often limited to acknowledging a point of the prior talk or having the hearer acknowledge the speaker's observation, often with a salient topic-curtailing and sequence-terminating import. The suffix -ta tends to orient the hearer to the next stage of the speaker's action (e.g., suggestion, warning, offer, etc.) to whose directive force the hearer is variably implicated as a beneficiary/facilitator. The interactional account offered in this paper is shown to complement Lee's cognitive account, with emphasis placed on examining the ways in which these suffixes are used as resources for organizing distinct types of social action.