Speakers take responsibility for their utterances in communication. Theoretical literature has suggested that speakers are more committed to what they explicitly say than what they implicate, but recent empirical studies have shown mixed results. This study readdresses the issue of speaker commitment attribution (i.e., to what's said vs. to what's implicated) by taking into account the factor of speech act (i.e., assertion and promise). Results showed that while speakers were more committed to what's said than what's implicated in an assertion, they were perceived to be equally committed to the said and implicated contents of a promise. We suggest this should be attributed to the difference in the nature of the implicated propositional content of the two speech acts, which was evidenced by participants' higher degree of certainty of the implicature derived from promise than assertion. The results suggest that commitment to what's said or what's implicated is not a fixed phenomenon and that speech act is an important factor that cannot be neglected in commitment study. In the end, we propose an experimental paradigm that contributes to future empirical study of speaker commitment at the theoretical and psycholinguistic crossroads.

说话者对自己在交流中的话语负责。理论文献表明，演讲者更倾向于他们明确表达的内容，而不是他们暗示的内容，但最近的实证研究显示出好坏参半的结果。这项研究通过考虑言语行为的因素（即断言和承诺）重新解决了说话者承诺归因的问题（即，对所说的内容与对所暗示的内容）。结果表明，虽然说话者更致力于所说的内容而不是断言中所暗示的内容，但他们被认为同样致力于承诺的所述内容和暗示内容。我们认为这应该归因于所暗示的命题内容的性质不同两种言语行为的重要性，这可以通过参与者对来自承诺而不是断言的含义的更高确定性来证明。结果表明，对所说或所暗示的内容的承诺不是一个固定的现象，言语行为是承诺研究中不可忽视的重要因素。最后，我们提出了一个实验范式，有助于未来在理论和心理语言学十字路口对说话者承诺的实证研究。