Preference questions: measure respondents’ preferences for different possible options and outcomes, including trade-offs between competing policy objectives.
Cwestiynau am ddewisiadau: mesur dewisiadau ymatebwyr ar gyfer gwahanol fathau o opsiynau a chanlyniadau posibl, gan gynnwys cyfnewidiadau rhwng amcanion polisïau sy’n cystadlu â’i gilydd.