My son took the Ravens progressive matrix test through our nearby school district, given by a psychologist. They used a conversion factor which was published through the LA school district (I don't have the exact reference).
It does not look like the link that was listed above for the Ravens test, on the internet. I also looked at the test on Youtube that is in Spanish- I don't think the scoring is based on that.
The test is (I think) somewhat similar- the person/child looks at lots of squiggles and decides which one should come next. My 6 year old had to do 50 questions in 40 minutes or so. Kind of mind-numbing.
He got 177 (over the ceiling) on the non-verbal part of the RIAS test, and got a 99.1% on the Ravens test. I do not think the online tests you are looking at closely correlate with the "real" Ravens test.
