Intermedia Attribute Agenda Setting Between the U.S. Mainstream Newspapers and Twitter: A Two-Study Analysis of the Paradigm and Driving Forces of the Agenda Flow

Performing two studies, we explore the intermedia attribute agenda-setting effects between the U.S. mainstream newspapers and Twitter. Leveraging computational methodologies, Study 1 analyzes 3,541 newspaper articles and over 1.06 million tweets about the 2020 Black Lives Matter movement, illustrating asymmetrical reciprocity of substantive attributes and mutual independency of affective attributes between both outlets. Study 2 performs in-depth interviews with 16 American journalists, showing that journalists increasingly see Twitter as a news source hub, a self-promotion platform, and a prism of distorted public sentiments. The juxtaposition of both studies revealed the paradigm and driving forces of the intermedia agenda flow.