Strong positive correlation was between all elements of the cognitive test and age among ID children (r = 0.55-0.66, P <0.001) but not such connection existed in WID children.
Sterk jákvæð fylgni var á milli einstakra þátta greindarprófsins og aldurs hjá ID börnum (r = 0,55-0,66, P <0,001) en ekkert slíkt samband fannst hjá WID börnum.