My kids have both had the RIAS and we found the results to be very consistent with more substantial testing. It was helpful as a first start. The psychologist said it was hard to draw many conclusions from the subtests and that more testing would be better if there were any concerns. I was impressed at how consistent the scores were, so I felt the RIAS was useful for knowing more testing would be helpful, but the more substantial tests give much more helpful information about the specific areas in the subtests.