For the students who would have gone on to test well on the IB test, this is clearly a disadvantage.
E.g. : 1) You are in the 10th percentile of your class. 2) Students from your school in the 10th percentile scored in the 20th percentile on the IB test last year 3) You are assigned a 20th percentile on the IB test you can not take.
This sucks if you would have done better than the 20th percentile on the IB test.
Why model an IB test score at all? just apply a weighing to the coursework grades if you want to standardize outcomes between schools. it would be more straight-forwarded.
A person in the 10th percentile in coursework is already worse than 90% of their peers and is unlikely to go to university no matter what school they attend. On the other hand, a student in the 90th percentile of a low performing school is going to be fine. Their predicted score is going to be well above their peers.
I said why make up a test score instead of just using weighted coursework.
> As for your description, that’s a gross oversimplification. What they’ve actually done is predicted people’s test scores based on their performance in coursework relative to their peers.
This is exactly what I described. taking someone's performance percentile in their school and predicting what they would score on the IB test. This appears to be exactly what they are doing
>A person in the 10th percentile in coursework is already worse than 90% of their peers and is unlikely to go to university no matter what school they attend
Sorry I was not more clear, I meant top 10th percentile.
>On the other hand, a student in the 90th percentile of a low performing school is going to be fine. Their predicted score is going to be well above their peers.
No, a student in the 90th (top 10th) percentile of coursework at a low performing school is the ones who are harmed. They will be assigned a higher IB test score than most of their school, but lower than the 90th (top 10th) percentile student in a school with a better track record on the IB test.
