Most would prefer to participate in research in the afternoon or evening; on a one-to-one or group basis; and would rather not complete diaries for research purposes.
Byddai'n well gan y mwyafrif ohonynt gymryd rhan mewn ymchwil yn y prynhawn neu gyda'r nos; ar sail un-i-un neu grŵp; a byddai'n well ganddynt beidio â chwblhau dyddiaduron at ddibenion ymchwil.