level4dWhat Is the CAT 4 Level D Test? The Cognitive Abilities Test fourth edition (CAT 4) is an aptitude test desned to measure the cognitive abilities of students in year 7 in the United Kingdom orquite frankly (debating able on how op) but take 1 level in forge cleric and fhter (or 2 in paladinranger) then build on one of thoes classes.