People of color also are more likely to suffer disparities in mental health treatment in general, which results in their being more likely to be ushered into the criminal justice system, says Tiffany Townsend, PhD, senior director of ethnic minority affairs in APA's Public Interest Directorate.
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 âIntelligent Quotientâ.
50% of IQ scores fall between 90 and 110. 70% of IQ scores fall between 85 and 115. 95% of IQ scores fall between 70 and 130. 99.5% of IQ scores fall between 60 and 140. Low IQ & Mental Retardation. An IQ under 70 is considered as mental retardation or limited mental ability.5% of the population falls below 70 on IQ tests.hat all that means is that an IQ of 106 roughly corresponds to a percentile rank within the population of about 65%, or, in other words, a person with an IQ of 106 is smarter than 65% of the population. By one accounting, the average college graduate has an IQ of 116 (and a percentile rank of 84%).