Methodology

Computer-Assisted Personal Interviews (CAPI) were conducted in Norway using the online panel of the marketing research company Norstat, which includes approximately 124,000 active respondents. A dynamic sampling approach was employed to obtain a sample that was as representative as possible of the adult population (aged 18 and older) in terms of gender, age, and region. Sampling quotas were guided by expected response rates across socio-demographic groups. When specific groups were underrepresented, additional participants were recruited to meet the predefined quotas, within the limitations of the panel. A weight variable corresponding to the quotas is provided in the dataset.

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The survey began on December 7, 2023, with a pilot/soft launch that collected 92 responses. The data from this initial phase were shared with the Norwegian University of Life Sciences (NMBU) and the Belgian Nuclear Research Centre (SCK CEN) for review on December 12, 2023, and approved on December 13, 2023. Additional samples were distributed daily from December 13 to December 18, 2023.

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Fieldwork was conducted by Norstat, a company that operates in compliance with the EU General Data Protection Regulation (EU-GDPR) and adheres to ESOMAR guidelines for market and social research. The final sample comprised N = 1,263respondents, yielding a response rate of 20.3%.

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The questionnaire was collaboratively developed by the RadoNorm project and the Norwegian University of Life Sciences (NMBU). NMBU was responsible for the translation into Norwegian. Ethical approval for the study was granted by the NMBU Ethics Committee, and the data were analyzed by SCK CEN, Belgium. Data are available at: DOI:10.20348/STOREDB/1179/1305]