Our son took the ERB Test (ERB calls it the ECAA test, which has 8/10 subtests from the WPPSI-III). He got a 99%x3 (verbal, performance, and full scale) but our preschool director told us the score was exceptional. His sum of scaled scores was 148 of of 152 (maximum scaled score = 8 subtests x 19). He actually got the maximum 19 scaled score on 7/8 subtests and only received a lower scaled score on the coding section. Our preschool director told us that 99% starts at 125 sum of scaled scores and that anything over 135 was very unusual (145+ extremely uncommon, he had never seen anything over 144 in the past decade). He said he thought (but wasn't 100% sure) that the 148 equated to a 99.99% and an implied full scale IQ of 156 (the maximum achievable on WPPSI-III is 160). I wanted to check if these numbers are correct and if the 148/152 scaled score would be considered to be profoundly gifted. Can anyone comment on this and provide some insight. Thank you.
