How does adaptive nature of the test work for RC?

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The GMAT is adaptive (CAT), meaning if you answer questions correctly you get harder questions. How does this algorithm work in case of RC passages? Questions related to a RC passage are, generally, grouped in sets of 3, 4 or 5. Suppose, you answered both the first and the second question for a passage correctly. Would the 3rd question be more difficult or would the text of the next passage be more difficult? Also, suppose you answered 4-5 say, SC questions correctly before you encounter your first RC passage. Would you get a harder passage? Had you not answered the SC question correctly, would you get an easier passage?

So, what I am asking is how does the adaptive part work
1) between questions for a single passage
2) between separate passages
3) between SC-CR-RC together?

I am just curious.
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by David@VeritasPrep » Sun Jul 03, 2011 2:38 pm
The verbal section adapts as a whole. So your performance on each of the verbal portions impacts the difficulty of all of the questions. So, yes, doing poorly on Sentence Correction will result in less difficult reading comp passages and questions.

As to how the reading comp adapts within a passage, the passage and all of the questions for that passage are selected at once. So that missing the first 3 questions for a particular passage will not change the question you get for the 4th question in that passage. Of course how you perform on reading passages will impact the difficulty future passages (as will your performance on sentence correction and critical reasoning.
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by smodak » Sun Jul 03, 2011 4:25 pm
Thanks.