Computer-Assisted Personal Interviews (CAPI) were conducted in Galicia using an online panel provided by the marketing research company Netquest. A non-probability quota sampling method was used to obtain a sample broadly representative of the adult population (aged 18 and older) in Galicia, with respect to gender, age, level of urbanisation, and province or administrative region.

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Sampling was carried out using randomized quotas based on panel quality criteria. Panellists were individually invited with a unique access code and received up to two reminders if they had not yet participated. Sampling quotas were determined based on expected response rates across socio-demographic groups. To address underrepresentation, additional respondents were recruited—within the limits of the available panel—to meet the predefined quotas. Deviations from the target population were corrected through weighting, resulting in a weighting efficiency of 9.915%. A weighting variable is included in the dataset.

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Data collection began with a soft launch (N = 85) on January 20, 2023, followed by the main fieldwork on January 23, 2023. The fieldwork was conducted by Netquest in compliance with the European Union’s General Data Protection Regulation (EU-GDPR) and the ESOMAR guidelines for market and social research.

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The final sample consisted of 508 respondents, yielding a response rate of 67.17%. The average time to complete the questionnaire was approximately 20 minutes.

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The questionnaire was jointly developed by the RadoNorm project and MERIENCE, an environmental and sustainability consultancy based in Barcelona, which also provided the Spanish translation. Data analysis was performed by SCK CEN in Belgium. Data are available at: DOI:10.20348/STOREDB/1179/1309