新型主流媒体战略提出十周年之际，本研究立足本土的社会情境框架与传播体系，构建科学系统的新型主流媒体公信力评估量表，解决传统评价工具无法适配新传播场域与新型主流媒体的问题，既丰富中国特色的实践探索，也进一步完善媒体公信力理论。本研究严格按照量表开发程序，构建公众视角下的新型主流媒体公信力二阶四维度量表。以相关文献为支撑，通过深度访谈与专家咨询筛选新型主流媒体公信力的备选测量条目；采用问卷调查的方法，使用探索性因子分析进行量表初测（n=500），通过验证性因子分析与进一步信效度检验确定量表的拟合情况（n=1723）。最终，本研究建成涵盖“真实性/专业性”“国家形象/权威性”“公共价值”“播发技巧”四个维度的新型主流媒体公信力量表，并与过往研究进行理论对话，探讨媒体公信力理论的延续和发展。

On the occasion of the 10th anniversary of the proposal of the new mainstream media strategy, this study is based on the local social context framework and communication system, focusing on constructing a scientific and systematic credibility assessment scale for new mainstream media. It aims to solve the problem that traditional evaluation tools cannot adapt to the new communication field and new mainstream media, enrich the practical exploration with Chinese characteristics, and also contribute to the further improvement of media credibility theory. This study strictly follows the scale development procedure to construct a two-factor, four- dimensional credibility scale of new mainstream media from the public perspective. Supported by relevant literature, it screens the potential measurement items of new mainstream media credibility through in-depth interviews and expert consultations; using questionnaire methods, it conducts the initial scale test with exploratory factor analysis (n=500), and determines the fitting situation of the scale through confirmatory factor analysis and reliability and validity tests (n=1723). Finally, this study constructs a credibility scale of new mainstream media covering four dimensions: “authenticity/professionalism”“national image/authority”“public value” and “broadcasting skills”. It also engages in theoretical dialogue with previous studies, exploring the continuity and development of media credibility theory.