| Citizen video news is an important composition and manifestation of citizen journalism. The nature of it is non-government mobilizing individuals to monitor social organs and to provide an efficient measure of protecting the vulnerable groups. Citizen video news plays an increasing significant role in current public lives. Consensus between the video shooter and the viewer potentially promote the transferring power of the authorities that impact on social justice. However, as one of the most representative form of citizen journalism, citizen video news is not much studied, which provide a possibility for further exploration theoretically and practically.Starting with the special manifestation of citizen video news, based on the collection of 380 pieces of citizen video news in Sohu, Sina, Youku and Ku6 from 1 May 2009 to 30 April 2010, the dissertation probes the public opinion formation, communication effectiveness and social impact of citizen video news by strictly coded, measured and tested, combined with content analysis and Theoretical Investigation.The First Chapter traces the development of citizen video news from the network video and citizen journalism respectively, analyzes the relationship between citizen video news and previous forms of citizen journalism, which connotation is defined as short videos investigating, recording and reporting issues that is happening or just happened by ordinary individuals, who shoot, edit and publish those videos online;The Second Chapter analyzes the "open" text structure of the citizen video news, indicates the statistics of technical feature of the samples and concludes that: despite its shape is very different from professional TV news, citizens video news uses their stylish grammar to do consecutive reports, series reports and investigative reports. But all in all, they are transformed news; Chapter Three shows the statistics relative to the types of video news content, hot issues and attitude tendency, and finds that citizen video news is dominated by the emergencies and supervisory video, while the supervisory video is dominated by negative reporting. Base on the findings, the dissertation extracts the wording "critical expression" to summarize the collective position and attitude of citizen video news. In this chapter the critical attitude and public consciousness of individuals is fully confirmed, meanwhile the social transformation is attributed as the inner incentives that decide the reporting framework;Chapter Four examines the communication process of citizen video news, sums up three elements influencing the content production and analyzes the potential gate-keeping mechanism. Based on analysis above, core elements and commonly used rhetorical strategies are concluded to explain the reason for that the citizen video's authenticity has not been much doubted even thought its"gate-keeping"function is weakened;Chapter Five focuses on the communication effects of the citizen video news. Firstly measures the correlation between various factors and click rate, number of comments, followed demonstrates audience attitudes by technical analysis message text, then describes the formation, expression and characteristics of public opinion, last but not least reveals its unique law: "refraction" happened in the formation and "Spillover effect "happened on the dissemination of results;Chapter Six discusses social effects of citizen video news, and reviews the cultural and political significance from the perspective of humanistic care. As it concluded that the citizen video news'pursuit of social fair ness and democratic progress is valuable despite of the very limited force;Chapter Seven summarizes the innovative theoretical value and social value brought by the citizen video news. By re-confirming its "boundary" and "kernel " , this dissertation anticipates some possible trends and prospects.Based on the abundant concrete researches of content analysis, this dissertation proposes an exploration on the related technology, content tendency, communication format and effect, hereby to make a try in news revolutionary in the comparison with the traditional news, then to provide a reference for the public, the academics and government to adapt to the times of citizen journalism.
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