据素作为信息来源和表明作者态度的语言资源，表明了作者对信息可信度的关注。本研究将据素视作人格诉诸机制的劝说资源，基于英语学术论文中不同类型据素的语步分布状况，解读英语学术论文各语步中据素的人格诉诸机制。研究发现，英语学术论文作者在不同语步中选择不同类型的据素进行人格诉诸，使读者对其明智、美德和友善怀抱信任，提升了作者的学术可信度，加强了语篇的劝说效果。

As a source of information and an indicator of authors’ attitude, evidentials indicate the authors concern for the credibility of information. Evidentials can be regarded as persuasive resources of building ethos. Drawing on the distribution of evidentials in different moves of English research articles, this study analyzes the way that evidentials build ethos in different moves of English research articles. This study finds that authors select different evidentials to build their ethos in different moves of English research articles so that readers trust in their wisdom, virtue and goodwill, aiming to enhance their academic credibility and the persuasive effect of discourse.