This means that this approach can account for the level of challenge of the different questions and produce IRT scores that are comparable no matter which questions each pupil answered.
Mae hyn yn golygu y gall y dull hwn gymryd lefel yr her i ystyriaeth ar gyfer y gwahanol gwestiynau, a chynhyrchu sgoriau IRT y gellir eu cymharu waeth pa gwestiynau a atebwyd gan bob disgybl.