Does anyone have experience with the Reynolds Intellectual Assessment Scales (RIAS)? It's one of two tests (along with the CoGAT) that our school administers for placement in the GT program. My 6 yr old scored at 99.83% on the RIAS and in the 80% range on the CoGAT. The discrepancy struck the GT teacher and counselor and I'm curious about the differences between these tests and how to interpret the disparate scores. Thanks!

No specific experience - just that it sounds like the difference between IQ and achievement. IQ tests can get good responses by having interesting question types. Achievement tests may be seen as boring and not worth the effort if they are too easy and too far below a child's level.

Have you checked hoagies to see what they have to say about it?

Our district is phasing out the use of the CogAT, as it apparently has a very high false negative rate, particularly at the younger ages. This could be the case for your child and could explain the discrepancy.

Have you seen how the CogAT is administered? In our case 2nd graders have the test read to them, and then have to fill in bubble sheets. Both of these are odd expereinces for an advanced child, especially one with auditory issues.