Hi, I took the Riot recently (see image if interested in the results) and was wondering about about the subtest ceiling. Based on articles I’ve read online the highest FSIQ score the test reports is 145 (+3 SD) but I couldn’t find anything concrete about the subtests themselves.
The sample of the manual says the sample norm size was 417 people and an additional 1,620 people as supplementary data for some but not all analyses.
I’ve given it some thought and the following is purely speculative. Cognitive performance can vary a lot by age so I imagine there was some binning by age for the norms, then maybe some other adjustments for other factors such as education, etc. If there is binning by age then I age norm size would be ~100, so realistically the subtests would be have an upper percentile around the 98th, 99th absolute max but it would be a bit tenuous with that 417 sample size.
I realise this assumes fairly simple age binning, and it’s entirely possible you’re using a regression-based or otherwise continuous norming approach that leverages the full dataset, or something else that handles the high end more robustly.
So my actual question is: how should subtest ceilings be interpreted on the RIOT?
