认识警觉能维持交际稳定，是人际信任的有机组成部分。基于信任模型中的可信性判断维度，本文提出引发认识警觉的线索：可行性、一致性与动机性，据此探究话语的可信性及因应策略。研究发现，认识警觉对听、说双方的言语行为具有潜在约束——听者从信息来源和内容判断话语的真实性，言者相应地操控言语行为，规避认识警觉。这一双向的动态关系协商凸显认识警觉对信任关系磋商的制约作用，可为拓展人际语用学的关系研究提供借鉴。

Epistemic vigilance contributes to the stability of communication, hence an integral part of interpersonal trust. Inspired by the factors of trustworthiness evaluation in trust model, this paper accordingly proposes three cues for hearer’s epistemic vigilance, namely, feasibility, consistency and motivationality. In light of the epistemic vigilance mechanism, this study aims to reveal the interaction between trustworthiness evaluation and its wash back on the conversation participants. It is found that epistemic vigilance exerts constraints on our communicative behaviors: The hearers check the reliability of the source and content of the information, while the communicators mobilize linguistic resources to manipulate the hearers evaluation via evading epistemic vigilance. This dynamic two way trust model, by way of highlighting the checking effects of epistemic vigilance on trust construction, will shed light on the relation study in interpersonal pragmatics.