The article “The Third-Person Effect in Communication” by W. Phillips Davison dates from 1983. In the article, Davison develops the idea of the Third-Person Effect in a very illustrative way. He discusses different interpretations of the effect, one of which has prevailed. It consists of two core assumptions: 1. People assume that other people are more influenced by media or media content than they are themselves. 2. The perception of strong media influences on others can lead to an influence on people’s behavior. Several reasons suggest that the text should be classified as a key work in communication studies: The ideas formulated by Davison were innovative, he could hardly rely on existing evidence from the scientific literature. The importance of the text is also due to the fact that the central assumptions about the Third-Person Effect developed there are still valid and the subject of intensive research – even if this research is now often conducted under the label of the Influence of Presumed Influence. It should also be emphasized that Davison has already established connections between the Third-Person Effect and other perceptual phenomena in his text, thus paving at an early stage the way for a linking of these approaches.