Critical Reasoning (CR) | Re: In a study examining the neural pathway linking auditory perception

­The researchers conclude that they have found the anatomical cause of tone deafness: tone-deaf people have "many fewer fibers on the arcuate fasciculus" than do non-tone-deaf people. In fact, 90% of tone-deaf people don't seem to have a "superior branch of the arcuate fasciculus."

We're looking for a major flaw in the researcher's reasoning. Here's(D):


(D) gives us a bit more information about the nature of the difference between tone-deaf and non-tone-deaf people. Tone-deaf folks have "many" fewer fibers, but those fibers exhibit "more activity."

Notice that we don't know howmuch more activity -- it could be that these fibers are just SLIGHTLY more active, meaning that "many fewer" fibers in tone-deaf people are still processing way less info
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Statistics : Posted by GMATNinja • on 03 Apr 2024, 22:21 • Replies 7 • Views 1595

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