Andreas Schleicher
speaker
38 appearances
2 recordings
1 series
first heard Apr 2011
last heard Dec 2013
Andreas Schleicher’s voice in public audio — every appearance, attributed to the second.
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Appearances
I mean, we have made the judgment when we are in doubt, we don't publish data.
Quite frankly, there's probably little doubt that the performance of the UK has at best been flat.
But, you know, we don't want to get, as the OECD, into methodological debates.
And what has Michael Gove said to that?
When you choose five items, you see that impact.
But no sensible person would test a country based on five tasks.
We have two hours of testing time, 270 minutes of material on the item pool precisely to construct a test that on balance is equally fair.
You see, I'm not saying that you cannot possibly find a task in which Denmark does significantly better than England and another task in which Denmark does worse than England.
The question is, will your test as a whole, a
appropriately compare British and Danish performance?
And that is the question that we have demonstrated in every possible way.
Good.
I mean, again, you know, we have published the item fit statistics and we do that on every assessment.
You know, Pisa is completely transparent about it.
A model is always an approximation of reality.
The rash model and any scaling model is an approximation of the reality that you observe.
The question is not, does the model exactly fit the reality?
The question is, does the model fit the reality such that there is no distortion of the results?
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