3. Reliability & validity The concepts of reliability and validity are very important when it comes to the testing of intellectual abilities. When tests are given such importance (in terms of how we look at and use the numbers), they must be carefully constructed to be as accurate as possible. Could a test of intelligence be reliable, but not valid? How? Could some other measure (assessing something other than intelligence) be valid, but NOT reliable? Why or why not? Give examples. 4. Intelligence tests Of what practical use are intelligence tests? Does it matter what someone's "IQ" is? Why or why not? Do you think that you could tell the difference between two people whose IQ scores differ by 10 points? By 20? (Assume normal, everyday type conversations.) At what size gap do you think there WOULD be a noticeable difference? What behavior(s) or other observations would signal to you that a person has a higher IQ score?