As stated in HM Treasury guidance, deliberative research methods are appropriate where participants require a large amount of information to form a judgement and meaningfully engage in a topic.
Fel y nodir yng nghanllawiau Trysorlys EF, mae dulliau ymchwil seiliedig ar drafod yn briodol lle mae angen llawer iawn o wybodaeth ar gyfranogwyr i ffurfio barn a chymryd rhan ystyrlon mewn pwnc.