ADI pass rates explained. See the truth behind the figures

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Truth about ADI pass rates

ADI pass rates explained


Many people worry about the pass rate figures for becoming an ADI but they can be very misleading. Let’s look at how pass rates can give you the wrong idea.

We’re going to imagine that 100 people begin training as instructors and we’ll see how many make it through based on official DSA pass rates from Dec 2010 to June 2011

Part 1 – 49.5% pass so 49.5 people will make it to part 2

Part 2 – 52.9% pass so we’ve just lost 23.5 people and have 26 left to go to part 3

Part 3 – 36% pass so 9.36 of the 26 people from part 2 qualified.

That looks quite bad doesn’t it? Only 9 people got through? No, actually a lot more would have got through. For part 1 the pass rate is 50% but that doesn’t mean only 50% of people are passing, it means 50% of tests are failed. Imagine 100 people took part 1 and all failed. The same 100 people then took it again and they all passed. The pass rate would still be 50% and yet all the people have passed! People are easily fooled by statistics.

It’s the same for part 2 and 3. It’s not unusual to wait 6 to 8 months for a part 3 test date and the figures above are only for 7 months, December 2010 to June 2011. Therefore all those figures mean is that 36% passed within those 7 months.

It’s the same for L tests. 100 learners could take the test and fail then take it again and pass. The pass rate is therefore 50% but that doesn’t meant only 50% are EVER passing, they all passed! It just means they don’t all pass first time.

Yet another example is when schools boast of their own pass rates. You’ll often see things such as 100% pass rate. Wow, they must be great! No, because it doesn’t say 100% first time pass rate does it? Their pupils could be failing 5 times each before passing and they’d still have a 100% pass rate.


Don’t be fooled by pass rates!


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