I'm fairly familiar with the RIAS because my daughter was given it to support her grade acceleration. It's a shorter IQ individual IQ test, so you don't get all of the detailed subscale information you would get with an SB-V or WISC-IV. The composite is basically like the full scale IQ score. So if you see a discussion that refers to full scale IQ of 130, for example (that's a common cutoff), then you'd refer to that composite number.
There are some reports that the RIAS may tend to give higher scores than other assessments. Our experience was that that was true for the composite score versus her WISC-IV score, but not for the subscores. The RIAS was pretty consistent with my daughter's other scores, except that her verbal intelligence index was a little lower on it and her composite score was a little higher (but not much).
She did think the RIAS was the most fun of the tests she has taken. She really enjoyed it.
