how to determine iq's, what are considered lowest to highest
Units of IQ Rating. The IQ rating scale is built with a mathematical comparison of your mental age with your chronological age, and the result is multiplied by 100 for normalization. Lewis M. Terman, professor of psychology, is quoted to give IQ rating scale a mathematical name of âIntelligent Quotientâ.
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.