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| Category | Definition | Category formulation purpose | Theoretical basis for category formulation | Research questions |
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| Report genre category | Expression form of report content | Different reporting genres have different functions, and choosing the appropriate reporting genres is conducive to achieve the communication effect. | Properly grasp and use the genre of news reports, and make news materials suitable for their place, without wasting materials. | What are the most used reporting genres in different types of media |
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| Topic framework category | The core idea of news content | Understand that there are several news frames contained in the “poison capsule” event; positioning how different media frame the “poison capsule” event. | “News framework is the heart or main point of news content.” | What are the main theme frameworks presented, and how are the reporting frameworks of different types of media “poison capsule” events different |
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| Source category | General provider or providing organization of newsletters | In the “poison capsule incident” report, which sources did the three media choose, and whether there was a bias in the choice of sources. | “The news sources are the competitors of social action, competing for the initiative of speaking and discourse in the media field. These competitors mobilize resources and manpower through the organizational culture, construct the speaking content in line with the organizational framework, and try to approach the media, so as to win their acceptance of the argument, become the core and basic position of the news framework, so as to affect the public and build the mainstream trend of thought in the society.” | What are the differences between different media in the choice of news sources, and the relationship between news sources and the formation of the framework |
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| Report protagonist category | Key reporting objects in the news | Summarize what aspects of the “poison capsule incident” were highlighted by the three media. | Zhong Xiaowen: “the focus of every news report is to outline the essentials’ it can be said that it is the theme embodiment of a news content.” | What are the main reporting objects, and how are the reporting objects of different media different |
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| Report position category | Is the attitude of the report positive, negative or neutral | Grasping the reporting position will directly affect the scientific disposal of public health emergencies. | Modigliani: “only with active supporters can an issue achieve social reality.” | What is the reporting position? Are the reporting positions of different media the same |
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