My 5 yr old son just took a WPPSI-III and the FS IQ is 146 (v 149 p 144). The report says it's a very conservative estimate based on the tester's observation. (I guess it's mainly because he was too tired. somehow he got overexcited the night before and didn't sleep well. he almost felt sleep after one hour test and he didn't want to answer some questions in the later half of the test.) Anyway, I learned that WPPSI-III is capped at 160. But WISC-IV is not. So is there a mapping or projection from the younger children's WPPSI-III score to the older children's WISC-V score? Or it should be the same for the same person, assuming both score were ideally accurate?
