The survey materials were found to be working well overall, but interviewers flagged up some amendments that should be considered for the A5 postcard reminder and the questionnaire showcards.
roedd mwyafrif yr ymatebwyr o’r farn y byddai’n werth nodi sgoriau oedran ar gyfer y profion, yn ogystal â sgoriau safonol a sgoriau cynnydd.