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
a. IQ tests are not reliable.
b. most forms of intellectual disability have biological causes.
c. many adults with low IQs have adequate adaptive skills.
d. only people younger than age 18 can be diagnosed with intellectual disability.
Answer: c.
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A) Adolescents B) Young adults C) Grade schoolers D) Toddlers
In a__________ design, researchers can identify common patterns as well as individual differences in development because it tracks the performance of each person over time
A) cross-sectional B) microgenetic C) longitudinal D) sequential
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