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In a recent study, one group of participants watched video recordings

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In a recent study, one group of participants watched video recordings  [#permalink]

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New post 17 Jul 2018, 21:39
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In a recent study, one group of participants watched video recordings of themselves running on treadmills, and a second group watched recordings of other people running on treadmills. When contacted later, participants in the first group reported exercising, on average, 1 hour longer each day than did the other participants. This shows that watching a recording of yourself exercising can motivate you to exercise more.

Which one of the following, if true, most weakens the argument?


(A) In another study, people who watched recordings of themselves lifting weights exercised for more time each day than did people who watched recordings of themselves running.

(B) Another study's members exhibited an increased willingness to give to charity after hearing stories in which people with whom they identified did so.

(C) Participants who were already highly motivated to exercise did not report exercising for any longer each day than they had before the study.

(D) In studies of identical twins, participants who observed their twin reading overreported by a significant amount how much time they themselves spent reading in the days that followed.

(E) A third group of participants who watched recordings of themselves sitting on couches afterwards reported being sedentary for more time each day than did the other participants.



Source: LSAT

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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 18 Jul 2018, 00:21
Cause and Effect analysis -
Watching a video of yourself gives motivation ---> run more.

Option C eliminates the situation of being motivated. Because highly motivated participants did not report exercise longer than before the study.
Ans C


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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 18 Jul 2018, 07:19
HimoGMAT wrote:
Cause and Effect analysis -
Watching a video of yourself gives motivation ---> run more.

Option C eliminates the situation of being motivated. Because highly motivated participants did not report exercise longer than before the study.
Ans C


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IMO Answer is D

As it attacks the sole premise necessary for holding conclusion by stating people might overreport the amount of time they spend on exercising
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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 18 Jul 2018, 08:15
In a recent study, one group of participants watched video recordings of themselves running on treadmills, and a second group watched recordings of other people running on treadmills. When contacted later, participants in the first group reported exercising, on average, 1 hour longer each day than did the other participants. This shows that watching a recording of yourself exercising can motivate you to exercise more.

Which one of the following, if true, most weakens the argument?

(A) In another study, people who watched recordings of themselves lifting weights exercised for more time each day than did people who watched recordings of themselves running.
(B) Another study's members exhibited an increased willingness to give to charity after hearing stories in which people with whom they identified did so.
(C) Participants who were already highly motivated to exercise did not report exercising for any longer each day than they had before the study.
(D) In studies of identical twins, participants who observed their twin reading overreported by a significant amount how much time they themselves spent reading in the days that followed.
(E) A third group of participants who watched recordings of themselves sitting on couches afterwards reported being sedentary for more time each day than did the other participants.

Let me take a shot at this question. The conclusion of the argument is "watching a recording of yourself exercising can motivate you to exercise more".
The evidence presented in support of the conclusion is that people who watched themselves in the video actually reported an 1 hour more on average.
We have a task to find a statement that weakens the conclusion.

Remember that we have to weaken the conclusion that watching a recording of yourself exercising does not necessarily motivate you to exercise more.

Option A : This choice just compares the set of people who watched themselves execise and who watched themselves lifting weights.Does not attach the conclusion in any way.
Option B : This choice somewhat strengthens the conclusion. It says that people donated to charity more after hearing stories with whom they identified.
Option C : This choice might seem to be an attractive one when you first read it. However,if you read it carefully,it does not attack the conclusion.
Option D : Here comes the answer. It says, that when a twin observed his/her twin reading, the former overreported. Now, think about our argument.May be, the people
who watched their own recordings overreported. In that case, the conclusion falls apart.
Option E : This choice again somewhat strengthens the argument.

Answer Option D looks like the only contender.

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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 18 Jul 2018, 09:54
LeoGT wrote:
In a recent study, one group of participants watched video recordings of themselves running on treadmills, and a second group watched recordings of other people running on treadmills. When contacted later, participants in the first group reported exercising, on average, 1 hour longer each day than did the other participants. This shows that watching a recording of yourself exercising can motivate you to exercise more.

Which one of the following, if true, most weakens the argument?


(A) In another study, people who watched recordings of themselves lifting weights exercised for more time each day than did people who watched recordings of themselves running.

(B) Another study's members exhibited an increased willingness to give to charity after hearing stories in which people with whom they identified did so.

(C) Participants who were already highly motivated to exercise did not report exercising for any longer each day than they had before the study.

(D) In studies of identical twins, participants who observed their twin reading overreported by a significant amount how much time they themselves spent reading in the days that followed.

(E) A third group of participants who watched recordings of themselves sitting on couches afterwards reported being sedentary for more time each day than did the other participants.



Source: LSAT


OE please... OA provided not very convincing...
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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 18 Jul 2018, 20:06
Harshgmat wrote:
LeoGT wrote:
In a recent study, one group of participants watched video recordings of themselves running on treadmills, and a second group watched recordings of other people running on treadmills. When contacted later, participants in the first group reported exercising, on average, 1 hour longer each day than did the other participants. This shows that watching a recording of yourself exercising can motivate you to exercise more.

Which one of the following, if true, most weakens the argument?


(A) In another study, people who watched recordings of themselves lifting weights exercised for more time each day than did people who watched recordings of themselves running.

(B) Another study's members exhibited an increased willingness to give to charity after hearing stories in which people with whom they identified did so.

(C) Participants who were already highly motivated to exercise did not report exercising for any longer each day than they had before the study.

(D) In studies of identical twins, participants who observed their twin reading overreported by a significant amount how much time they themselves spent reading in the days that followed.

(E) A third group of participants who watched recordings of themselves sitting on couches afterwards reported being sedentary for more time each day than did the other participants.



Source: LSAT


OE please... OA provided not very convincing...


HI Harshgmat
appriciate to hear your reasoning why OA is not convingcing
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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 18 Jul 2018, 23:10
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LeoGT wrote:
In a recent study, one group of participants watched video recordings of themselves running on treadmills, and a second group watched recordings of other people running on treadmills. When contacted later, participants in the first group reported exercising, on average, 1 hour longer each day than did the other participants. This shows that watching a recording of yourself exercising can motivate you to exercise more.

Which one of the following, if true, most weakens the argument?


(C) Participants who were already highly motivated to exercise did not report exercising for any longer each day than they had before the study.

(D) In studies of identical twins, participants who observed their twin reading overreported by a significant amount how much time they themselves spent reading in the days that followed.

Source: LSAT


Great Question!
Between C and D, C strengthens the argument. It can be inferred from C and the premise that people who were NOT highly motivated exercised longer each day, strengthening the conclusion - "watching a recording of yourself exercising can motivate you to exercise more."

D exploits the "When contacted later, participants in the first group reported " part of the premise. The participants themselves reported the results. D gives a reason that the conclusion is faulty.
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Re: In a recent study, one group of participants watched video recordings  [#permalink]

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New post 19 Jul 2018, 18:28
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LeoGT wrote:
Harshgmat wrote:
In a recent study, one group of participants watched video recordings of themselves running on treadmills, and a second group watched recordings of other people running on treadmills. When contacted later, participants in the first group reported exercising, on average, 1 hour longer each day than did the other participants. This shows that watching a recording of yourself exercising can motivate you to exercise more.

Which one of the following, if true, most weakens the argument?


(C) Participants who were already highly motivated to exercise did not report exercising for any longer each day than they had before the study.

(D) In studies of identical twins, participants who observed their twin reading over-reported by a significant amount how much time they themselves spent reading in the days that followed.

In my earlier attempt I has missed the subtle point in choice D- high-lighted above.

i.e. identical twin - So I am watching myself in the video and such persons have over reported.

So this destroys the argument that watching you own videos are doing exercise can motivate you.

Still I feel C is also weakener but D weakens the most.

LeoGT Thanks. Your post made me re-attempt....
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Re: In a recent study, one group of participants watched video recordings &nbs [#permalink] 19 Jul 2018, 18:28
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