Subaverage intellectual functioning is defined as an IQ approximately ____.
A) one standard deviation below the mean
B) two standard deviations below the mean
C) a mental age of less than 10 years
D) a mental age of less than 15 years

Question

Quizplus · Accepted Answer

Subaverage intellectual functioning is typically defined as an IQ score that is two or more standard deviations below the mean IQ score of 100. This means that the IQ score falls at or below the 2.3rd percentile, or approximately 70 points or lower on standardized IQ tests. A mental age of less than 10 or 15 years is often used as a criterion for intellectual disability or developmental delay, but this is not the same as subaverage intellectual functioning.

Subaverage Intellectual Functioning Is Defined as an IQ Approximately ____