You would expect a difference between CAT score and eleven plus score in Gloucestershire to some extent because the Glos. eleven plus is verbal reasoning only, whilst the CAT score is a combination of verbal reasoning, Non verbal reasoning & Maths.
This is why any comparison - in this situation - should be with CAT VR, not with the overall CAT result.
In the example given in the Q & A, surely you would expect the eleven plus test score to be lower than the CAT score, because the CAT score is standardized across the whole population, whilst the eleven plus is standardized across those children who are entered for the eleven plus, which is likely to be a significantly more able population.
I agree, but (1) how much lower? and (2) how many people are just going to make a simplistic comparison?
The Q&A is perhaps a bit misleading
I hope not - we start with a clear warning not
to make a simplistic comparison:
Different tests measure different things, might be carried out under different conditions, and could be standardised differently.
The example serves to illustrate how difficult it is for parents to understand the significance of CATs in relation to the !!+.