The study employed Computer-Assisted Web Interviewing (CAWI) to survey a sample of the Slovenian population. The panel consisted of 25,000 potential respondents from the panel of the marketing company MEDIANA, from which participants for this study were randomly selected. The final sample included 2,012 respondents, representative of the Slovenian population aged 18 and over, with respect to gender, age, and region, and stratified according to the total number of inhabitants in Slovenia. The response rate was 27.6%.

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Among the respondents, 77.5% lived in low radon risk areas, 14.2% in medium risk areas, and 8.4% in high risk areas. The average duration of the interviews was 19 minutes, conducted between November 29 and December 8, 2022.

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The questionnaire included a short video offering basic and neutral information about radon and the mitigation of elevated radon levels in homes. This video was shown selectively, with the aim of delivering relevant information to those who needed it most, enabling them to respond heuristically to questions regarding attitudes, emotions, and opinions.

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To ensure high data quality, a pilot study with 300 participants was conducted in the Walloon region of Belgium prior to the main fieldwork. This was followed by a soft launch in Slovenian, involving a sample of 264 participants.

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Ethical approval for the study was granted by the University of Antwerp, Belgium, with additional oversight provided by the RadoNorm ethical committee. The questionnaire development, translation into Slovenian, and fieldwork were funded by the Slovenian Radiation Protection Administration (Služba za varstvo pred sevanji – SRPA), Slovenia. Data were analysed by SCK CEN, Belgium and University Antwerp, Belgium and are available at DOI:10.20348/STOREDB/1179/1308