Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1508:30 AM PDT
-09:30 AM PDT
Struggling with Boldface or Paradox questions in GMAT Critical Reasoning (CR)? Boldface and Paradox CR questions are often overlooked amidst the other more common GMAT CR question types. But mastering these can significantly boost your Verbal score.- May 15
10:00 AM PDT
-11:00 AM PDT
Struggling to finish the GMAT on time? You’re not alone. The #1 reason students score lower than expected on the GMAT isn’t lack of knowledge or silly mistakes—it’s running out of time. - May 14
10:00 AM PDT
-11:00 AM PDT
GMAT Verbal Practice question quiz. Solve 20 GMAT Focus practice questions written by GMAT Ninja. Take this GMAT practice test live with peers in timed conditions, analyze your GMAT study progress, and see where you stand in the GMAT student pool. 
May 1411:30 AM EDT
-12:30 PM EDT
Is INSEAD your dream b-school and you're looking for solid prep and application strategies to get there? Check out Barkavi’s end-to-end journey to know how she did! Get insights into the INSEAD admissions process, know what Adcoms look at, and more!
May 1609:00 PM PDT
-10:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
May 1706:30 AM PDT
-08:30 AM PDT
We know Strengthen and Weaken questions account for more than 50% of the CR questions on the GMAT. With CR becoming even more important on GMAT Focus, it's time you strengthen your weaknesses with an approach that improves your solving time and accuracy!
May 1711:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- May 18
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease. - Jun 10
06:00 AM PDT
-05:30 PM PDT
Register for the GMAT Club Virtual MBA Spotlight fair, the biggest MBA fair of the year. You will have a chance to hear Admissions directors from almost every Top 20 program speak, network with peers, and conveniently attend morning or afternoon sessions.
12 Sep 2023, 05:22
Kudos
Bookmarks
D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
91% (01:45) correct
9%
(02:14)
wrong
based on 137
sessions
History
Date
Time
Result
Not Attempted Yet
In an experiment testing whether hyperactivity is due to a brain abnormality, the brain activity of 25 hyperactive adults was compared to the brain activity of 25 adults who were not hyperactive. The tests revealed that the hyperactive adults had much less brain activity in the premotor cortex, a region of the brain believed to control action, than did the non-hyperactive adults. The experimenters concluded that diminished activity in the premotor cortex is one cause of hyperactivity.
Which one of the following, if true, most undermines the conclusion drawn by the experimenters?
(A) Some of the non-hyperactive adults in the study had children who suffer from hyperactivity.
(B) The hyperactive adults who participated in the experiment varied in the severity of their symptoms.
(C) The neuropsychologists who designed the experiment were not present when the tests were performed.
(D) All of the hyperactive adults in the study had been treated for hyperactivity with a medication that is known to depress activity in some regions of the brain, while none of the non-hyperactive adults had been so treated.
(E) The test was performed only on adults because even though the method by which the test measured brain activity is harmless to adults, it does require the use of radiation, which could be harmful to children.
Which one of the following, if true, most undermines the conclusion drawn by the experimenters?
(A) Some of the non-hyperactive adults in the study had children who suffer from hyperactivity.
(B) The hyperactive adults who participated in the experiment varied in the severity of their symptoms.
(C) The neuropsychologists who designed the experiment were not present when the tests were performed.
(D) All of the hyperactive adults in the study had been treated for hyperactivity with a medication that is known to depress activity in some regions of the brain, while none of the non-hyperactive adults had been so treated.
(E) The test was performed only on adults because even though the method by which the test measured brain activity is harmless to adults, it does require the use of radiation, which could be harmful to children.
12 Sep 2023, 08:55
Kudos
Bookmarks
To undermine the conclusion drawn by the experimenters that diminished activity in the premotor cortex is one cause of hyperactivity, we need to find information that suggests an alternative explanation or confounding factor for the observed difference in brain activity between hyperactive and non-hyperactive adults.
Option (D) provides a potential alternative explanation. It states that all of the hyperactive adults in the study had been treated for hyperactivity with a medication known to depress activity in some regions of the brain, while none of the non-hyperactive adults had been treated with this medication. This suggests that the observed differences in brain activity between the two groups could be due to the effects of the medication rather than being a cause of hyperactivity. Therefore, option (D) undermines the conclusion drawn by the experimenters.
Option (A) mentions that some of the non-hyperactive adults had children who suffer from hyperactivity, but this information does not directly address the cause of hyperactivity in the adults themselves.
Option (B) mentions the variation in the severity of symptoms among hyperactive adults, but this alone doesn't necessarily undermine the conclusion about the premotor cortex's role in hyperactivity.
Option (C) discusses the presence of neuropsychologists during the test, but this doesn't directly relate to the cause of hyperactivity.
Option (E) discusses the use of radiation and the exclusion of children from the test, but it doesn't provide an alternative explanation for the observed brain activity differences in adults.
Option (D) provides a potential alternative explanation. It states that all of the hyperactive adults in the study had been treated for hyperactivity with a medication known to depress activity in some regions of the brain, while none of the non-hyperactive adults had been treated with this medication. This suggests that the observed differences in brain activity between the two groups could be due to the effects of the medication rather than being a cause of hyperactivity. Therefore, option (D) undermines the conclusion drawn by the experimenters.
Option (A) mentions that some of the non-hyperactive adults had children who suffer from hyperactivity, but this information does not directly address the cause of hyperactivity in the adults themselves.
Option (B) mentions the variation in the severity of symptoms among hyperactive adults, but this alone doesn't necessarily undermine the conclusion about the premotor cortex's role in hyperactivity.
Option (C) discusses the presence of neuropsychologists during the test, but this doesn't directly relate to the cause of hyperactivity.
Option (E) discusses the use of radiation and the exclusion of children from the test, but it doesn't provide an alternative explanation for the observed brain activity differences in adults.
11 May 2025, 22:46
Kudos
Bookmarks
To undermine the conclusion drawn by the experimenters that diminished activity in the premotor cortex is one cause of hyperactivity, we need to find information that suggests an alternative explanation or confounding factor for the observed difference in brain activity between hyperactive and non-hyperactive adults.
Option (D) provides a potential alternative explanation. It states that all of the hyperactive adults in the study had been treated for hyperactivity with a medication known to depress activity in some regions of the brain, while none of the non-hyperactive adults had been treated with this medication. This suggests that the observed differences in brain activity between the two groups could be due to the effects of the medication rather than being a cause of hyperactivity. Therefore, option (D) undermines the conclusion drawn by the experimenters.
Answer: D
Option (D) provides a potential alternative explanation. It states that all of the hyperactive adults in the study had been treated for hyperactivity with a medication known to depress activity in some regions of the brain, while none of the non-hyperactive adults had been treated with this medication. This suggests that the observed differences in brain activity between the two groups could be due to the effects of the medication rather than being a cause of hyperactivity. Therefore, option (D) undermines the conclusion drawn by the experimenters.
Answer: D
