The computer-adaptive format takes some getting used to---in fact, it’s pretty weird at first. Here’s how it works. You will see only one question at a time. Instead of having a predetermined mixture of basic, medium, and hard questions, the computer will select questions for you based on how well you are doing.
The first question will be of medium difficulty. If you get it right, the second question will be selected from a large pool of questions that are a little harder; if you get the first question wrong, the second will be a little more basic.
If you keep getting questions right, the test will get harder and harder; if you slip and make some mistakes, the test will adjust and start giving you easier problems, but if you answer them correctly, it will go back to the hard ones. Ideally, the test gives you enough questions to ensure that scores are not based on luck. If you get one hard question right, you might just have been lucky, but if you get ten hard questions right, then luck has little to do with it. So the test is self-adjusting and self-correcting.
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