This approach allows for the fact that the absence of some items is more uncommon, and so may be considered to represent a greater severity of deprivation than others.
Mae’r dull hwn yn ystyried y ffaith fod absenoldeb rhai eitemau’n fwy anghyffredin, ac y gellir dweud bod hyn yn dangos amddifadedd mwy difrifol nag a wna absenoldeb eitemau eraill.