Even though more than 2.3 percent of people have IQs below the 70 cutoff, only about 1 percent of the population has an intellectual disability. The prevalence of intellectual disability is lower than the prevalence of low IQs because

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Silvester

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Even though more than 2.3 percent of people have IQs below the 70 cutoff, only about 1 percent of the population has an intellectual disability. The prevalence of intellectual disability is lower than the prevalence of low IQs because

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Madeline Mahoney · Answer 1

Answer: The prevalence of intellectual disability is lower than the prevalence of low IQs because:

1. Many people with intellectual disabilities die at a younger age. As an indication of these facts, studies show that twice as many school-age children as preschoolers have intellectual disabilities, but the prevalence rates drop again among adults (Grossman, 1983).

2. IQs cannot be adequately assessed among very young children, who therefore may be omitted from prevalence figures.

3. many adults with low IQs are not considered to have intellectual disabilities because they have adaptive skills.