20世纪70年代,美国传播学家蒂奇诺等人在继《芝麻街》教育片的影响等一系列实证研究的基础上,提出了这样的理论假说:“即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,大众媒介传送的信息越多,这两者之间的知识鸿沟也就越有扩大的趋势。” In the 1970s, based on a series of empirical studies such as the influence of Sesame Street educational films, American media scholar Ricardo Ricciino and others proposed the following theoretical hypothesis: “That is, because of the high socio-economic status, usually Can get information faster than the lower socioeconomic status, so the more information the mass media send, the more the knowledge gap between the two will grow. ”"