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1970年,美国传播学家蒂奇诺等人在大量实证调查的基础上提出了传播学的“知识沟”理论:由于社会经济地位高者通常能比社会经济地位低者更快地获得信息,因此,大众媒介传达的信息越多,这两者之间的知识鸿沟也就越有扩大的趋势。1974年,N.卡茨曼从新传播技术发展的角度提出
In 1970, based on a large number of empirical investigations, American media researcher Riccione Ricciino et al. Proposed a theory of “knowledge gouging” of communication: social and economic status is usually higher than that of lower socio-economic status Information. Therefore, the more information the mass media convey, the more the knowledge gap between the two will expand. In 1974, N. Katzman put forward from the perspective of the development of new communication technologies