Here's a good link from Hoagiesgifted.org. It says that an actual (or implied) full scale IQ score of 152-160 on the WPPSI-III would be in the profoundly gifted category. So if 148/152 scaled scores implies a 156 fill scale IQ, then 1 148 implies profoundly gifted status. The issues are: (1) I don't have a conversion table to check that 148/152 implies a 156 IQ and (2) the ECAA/ERB, which only has 8 of the 10 subtests required for WPPSI-III, may not have enough subtests to be able to calculate or estimate a full scale IQ number.
http://www.hoagiesgifted.org/highly_profoundly.htm
