On to #21 (or back to it, I guess
).
The stimulus presents an interesting paradox: the witnesses who during the first questioning (the one attempting to yield inaccuracies) gave testimony with fewer inaccuracies
than most other witnesses then gave testimony with more inaccuracies
than most other witnesses after the second questioning (the one attempting to yield more accurate testimony). What could cause that to occur?
The first key is to realize that the scenario described in the stimulus allows for several results. The result that most test takers assume is occurring is that these witnesses first gave really accurate, low-error testimony, and then after the second questioning they gave testimony that had a greater number of errors. This is definitely possible, but another scenario is also possible: perhaps these witnesses first gave testimony that
by comparison had fewer errors than the testimonies of other witnesses; then after the second questioning, these witnesses stuck to their story, but the other witnesses then gave far more accurate testimony. For example, let's say that one witness, Witness A, falls into the group asked about in the question stem. Let's say that Witness A gave testimony in the first questioning that contained 10 inaccuracies. By comparison, most of the other witnesses gave testimony with 15 inaccuracies. Then, after the second questioning, Witness A gave testimony that again contained 10 inaccuracies, but the other witnesses gave testimony that contained only 5 inaccuracies. This scenario is also plausible, and plays a role in the correct answer.
Answer choice (C) is the correct answer. Under answer choice (C), the witnesses in question stuck to their story and basically gave the same testimony both times. As that occurred, the other, more influenceable witnesses went from a first questioning that induced them to give more inaccurate testimony to a second questioning that lead them to a more accurate testimony.
This is another tricky question, especially because of the way it leads you to interpret the relative accuracies of the witnesses.
Please let me know if that helps. Thanks!