This study empirically investigates the structural factors influencing changes in electromagnetic field (EMF) risk perception among users of the Small EMF Measurement Device Rental Service operated by the Korea Communications Agency (KCA). Although sc...
This study empirically investigates the structural factors influencing changes in electromagnetic field (EMF) risk perception among users of the Small EMF Measurement Device Rental Service operated by the Korea Communications Agency (KCA). Although scientific evaluations indicate that everyday EMF exposure poses minimal health risks, public concern remains disproportionately high, particularly with the expansion of 5G and IoT environments. In this context, experiential public services—where citizens directly measure EMF levels using certified devices—have emerged as a potential tool for correcting misperceptions. However, empirical evidence on the effectiveness of such services has been limited. Drawing on the Stimulus–Organism–Response (S–O–R) framework, this study examines how external factors (social influence, aesthetics, and perceived cost) affect user experience—operationalized as service satisfaction and equipment satisfaction—and how these experiences subsequently lead to changes in EMF perception. Survey data were collected from 297 service users in 2024, and a series of analyses were conducted, including descriptive analysis, correlation analysis, multicollinearity diagnostics, multiple regression, mediation analysis, and serial mediation analysis using PROCESS macro. The results indicate that social influence has no significant effect on either service satisfaction or equipment satisfaction, but exerts a direct positive influence on EMF perception change. In contrast, aesthetics and perceived cost negatively affect service satisfaction, and aesthetics additionally reduces equipment satisfaction. Service satisfaction strongly predicts equipment satisfaction (β = .727, p < .001), demonstrating that procedural service quality is a key antecedent to device-use evaluation. Equipment satisfaction emerges as the strongest determinant of EMF perception change (β = .527, p < .001), highlighting that direct measurement experiences substantially reshape users’ understanding of EMF exposure. Mediation analyses further confirm a significant indirect pathway in which service satisfaction enhances equipment satisfaction, which in turn influences perception change. Serial mediation effects are identified for aesthetics and perceived cost, whereas social influence operates solely through a direct pathway. The overall model is significant (F = 25.126, p < .001) with explanatory power of R² = .302.
These findings demonstrate that the rental service functions as an effective experiential intervention for alleviating EMF-related anxiety by providing users with reliable, firsthand measurement experiences. The study offers practical implications for improving service design, enhancing device usability, strengthening user-centered operational strategies, and informing national EMF communication policy