Content Types That Drive Engagement with Semi-Public Information Radiators: A Longitudinal Study of Interaction Logs

Information radiators in workplace environments display content from enterprise systems in semi-public spaces to support serendipitous discovery. However, display blindness can limit user engagement with such devices. This paper investigates how different content types influence engagement with an established workplace information radiator application, the CommunityMirrors. Three content types are distinguished: People, Organizational Units (Org Units), and Artifacts. A quantitative analysis of interaction logs collected over three months before, during, and after a lightweight intervention that highlighted the People items was conducted. Results show that the People items exhibited the highest baseline interaction rates but did not sustain increased engagement following the intervention. In contrast, Org Unit and Artifact items demonstrated increases in the interaction rates over time. These findings reveal that engagement trajectories differ by content type and that interventions may redistribute attention across content types rather than amplify attention to the targeted content. Consequently, content managers and researchers can design engagement strategies for semi-public information radiators more precisely.