Abstract The present study examined the recordings of naturally occurring conversations among native speakers of Japanese, and analyzed the cases of iya ‘no’ that are uttered in response to yes-no questions. The analysis has shown that iya can be uttered in response to a yes-no question even when the response to the question is ‘yes,’ as long as the propositional information that follows iya signals ‘yes’ to the question. When iya prefaces a response of ‘yes,’ the speaker can express a stronger message of ‘yes’ since it creates a pragmatic effect of expressing needless to ask… along with signaling ‘yes’ with the propositional information that follows iya.

中文翻译：

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说“不”，使“是”更强

摘要本研究检查了日语为母语的人之间自然对话的记录，并分析了对“是-否”的回答而发出的“否”的情况。分析表明，只要对问题的回答为“是”，即使对问题的回答为“是”，也可以回答是/否问题。当iya开头回答“是”时，说话者可以表达更强的“是”信息，因为它产生了务实的效果，即表达不必要的询问……并在跟着iya的命题信息表示“是”。