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“知沟”(knowledge gap,又译“知识沟”)假设自1970年提出以来,研究成果颇丰。至1996年,已有70余篇有关这一假设的研究报告问世(viswanath etal.,1996),成为20世纪70年代以来传播效果研究及其理论发展的重要成果。知沟假设
Knowledge gap (“knowledge gap”) The hypothesis of assumptions since its introduction in 1970, the research results quite good. By 1996, more than 70 research reports on this hypothesis (viswanath et al., 1996) have become important achievements in the study of the spread of communications and its theoretical development since the 1970s. Ditch hypothesis