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While there is a direct correlation between the number of

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New post 15 Apr 2018, 00:18
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While there is a direct correlation between the number of hours spent studying and the corresponding academic improvement, the platform on which these hours are spent can have a significant impact on the academic outcomes. To compare the academic improvement provided by Khan academy - an online K12 portal that teaches using audio-visual lessons – with that of a non-adaptive book-based learning system, one group studied using Khan academy, while the other group studied using traditional textbooks in a quiet closed classroom devoid of any electronic equipment. Both groups followed this method of studying within their respective rooms for two hours every day. After one month, the group that studied using Khan academy had improved a lot more than the one that used textbooks. Therefore, when a similar amount of time spent is considered, learning a piece of content using audio visual modes of instruction is much more effective than simply reading the same content.

Which of the following statements, if true, throws doubt on the notion that the audio-visual mode of instruction indeed was the reason for the better learning displayed by that group in the experiment?

A.Students who studied books for one hour and then spent time on Khan academy reported much higher academic improvement than students of either group.
B.Most students can focus on learning for more than one hour only if their study sessions are interspersed with short breaks in which they can play video games commonly found on most online AV sites.
C.When studying online at home, some students tend to visit other websites reducing the effective time to study drastically.
D.Most audio-visual modes of instruction cannot provide insights that the best instructors do.
E.The ability to assimilate multiple pieces of content and draw inferences is a much better indication of academic achievement than simply learning a piece of content.

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New post 15 Apr 2018, 05:13
A. Kind of trap, it says both are equally important.

B, C, D, irrelevant

E. Yes. This specifies that academic improvement should be measured by another metrics, instead of just learning content.

IMO E.

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New post 16 Apr 2018, 17:21
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Conclusion:-For learning a piece of content, audio visual modes of instruction are more effective than simply reading the same content.

A-This choice is irrelevant. In the question stem there are two groups. One that used audio visual content and the other that used only textbooks. This choice brings in an another group which did both. Hence is wrong

B-This is the correct answer. If most of the students can learn only when they take short breaks in which they play video games, then it means that the second group that used textbooks only was not able to focus on learning while the first one which used online portal may have got that breaks in between lessons. So the final result may have been due to the reason of the breaks rather than the use of audio visual content. Thus it weakens our conclusion. Hence correct

C- Irrelevant
D-Out of focus

E-This is also irrelevant. We need to weaken the claim that audio visual content is more effective than reading in 'learning' the content. While this choice talks about indication of academic achievement which is not the issue at hand. Also we cannot infer from the stem that reading actually leads to the ability to assimilate pieces of content and draw inferences. Hence this is also wrong

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New post 16 Apr 2018, 20:20
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Skywalker18 wrote:
While there is a direct correlation between the number of hours spent studying and the corresponding academic improvement, the platform on which these hours are spent can have a significant impact on the academic outcomes. To compare the academic improvement provided by Khan academy - an online K12 portal that teaches using audio-visual lessons – with that of a non-adaptive book-based learning system, one group studied using Khan academy, while the other group studied using traditional textbooks in a quiet closed classroom devoid of any electronic equipment. Both groups followed this method of studying within their respective rooms for two hours every day. After one month, the group that studied using Khan academy had improved a lot more than the one that used textbooks. Therefore, when a similar amount of time spent is considered, learning a piece of content using audio visual modes of instruction is much more effective than simply reading the same content.

Which of the following statements, if true, throws doubt on the notion that the audio-visual mode of instruction indeed was the reason for the better learning displayed by that group in the experiment?

A.Students who studied books for one hour and then spent time on Khan academy reported much higher academic improvement than students of either group.
B.Most students can focus on learning for more than one hour only if their study sessions are interspersed with short breaks in which they can play video games commonly found on most online AV sites.
C.When studying online at home, some students tend to visit other websites reducing the effective time to study drastically.
D.Most audio-visual modes of instruction cannot provide insights that the best instructors do.
E.The ability to assimilate multiple pieces of content and draw inferences is a much better indication of academic achievement than simply learning a piece of content.



Very interesting question where a seemingly out of scope option is the right answer. The question stem mentions the words ‘if true’. That means though the options doesn’t appeal realistic to us we should consider those options for analysis.Upon scanning the options, one could easily eliminate options A and C. Option E talks about the quality of learning which I don’t think the argument is aiming to address. It may be the case that even though both sets of students truly understand what learning entails there were differences between them. Option B, though seems out of scope actually fits the bill. If it’s true that better learning happens only with such online Games where class room students didn’t get access to then B will be right answer.

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New post 29 Apr 2018, 02:04
Good question

B is the OA.
we need to find an choice which needs to state that there is some other reason for improvement by students who take online class of Khan academy.In short Khan academy is not sole reason,there has to be something different from textbook readers which result in more result for online students.

B clearly states that thing as they can focus more by playing video games in interim online which enhances their concentration resulting in better results.

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New post 30 Apr 2018, 11:07
Experts broall sayantanc2k mikemcgarry GMATNinja egmat VeritasPrepKarishma

Please guide for this question
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New post 30 Apr 2018, 15:15
vasuca10 wrote:
Experts broall sayantanc2k mikemcgarry GMATNinja egmat VeritasPrepKarishma

Please guide for this question

While there is a direct correlation between the number of hours spent studying and the corresponding academic improvement, the platform on which these hours are spent can have a significant impact on the academic outcomes. To compare the academic improvement provided by Khan academy - an online K12 portal that teaches using audio-visual lessons – with that of a non-adaptive book-based learning system, one group studied using Khan academy, while the other group studied using traditional textbooks in a quiet closed classroom devoid of any electronic equipment. Both groups followed this method of studying within their respective rooms for two hours every day. After one month, the group that studied using Khan academy had improved a lot more than the one that used textbooks. Therefore, when a similar amount of time spent is considered, learning a piece of content using audio visual modes of instruction is much more effective than simply reading the same content.


Hope you don't mind me explaining before the experts :-)

Which of the following statements, if true, throws doubt on the notion that the audio-visual mode of instruction indeed was the reason for the better learning displayed by that group in the experiment? - Basically we need to weak the argument that "AV is the only/sole reason for better learning of students using AV mode".

Prethinking - If both AV & Text books students spend equal amount of time, there has to be another reason for AV students learning better. May its their knowledge grasping power/environment/something helping the AV students more that text book students.

A.Students who studied books for one hour and then spent time on Khan academy reported much higher academic improvement than students of either group. - Incorrect. We are concerned about AV mode of learning not AV+Text.

B.Most students can focus on learning for more than one hour only if their study sessions are interspersed with short breaks in which they can play video games commonly found on most online AV sites. - Correct. If both set of students can focus for only 1 hr then Text book students don't have anything to relax/chill. Whereas the AV students can play some games to relax and get their focus back on study. So, it weakens the argument. Basically this statement is saying that AV is not the only reason which helps students to perform but games also helps them.Note that Text book students also get breaks but they have nothing to do during breaks.

C.When studying online at home, some students tend to visit other websites reducing the effective time to study drastically. - Incorrect. Then how come they are performing well?

D.Most audio-visual modes of instruction cannot provide insights that the best instructors do. - Incorrect. Irrelevant.

E.The ability to assimilate multiple pieces of content and draw inferences is a much better indication of academic achievement than simply learning a piece of content. - Incorrect. That is why AV is doing well.
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New post 30 Apr 2018, 22:29
pl clarify why B is true and Not E.
Re: While there is a direct correlation between the number of &nbs [#permalink] 30 Apr 2018, 22:29
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