- IQ Ratings of Over 140 --Genius or near genius
- IQ Ratings of 120 to 140--Highly intelligent
- IQ Ratings of 110 to 119 --Very intelligent
- IQ Rating of 90 to 109 --Normal or average intelligence
- IQ Ratings of 80 to 89 -- Dullness
- IQ Rating of 70-79 --Borderline deficiency
- IQ Ratings below 70 --Definite feeble-mindedness