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# In 1960 s studies of rats, scientists found that crowding

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In 1960 s studies of rats, scientists found that crowding [#permalink]

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08 Nov 2011, 16:44
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In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, although there was an increase in instances of “coping” behavior—such as submissive gestures and avoidance of dominant individuals—attacks did not become any more frequent. Therefore it is not likely that, for any species of monkey,
crowding increases aggression as significantly as was seen in rats. Which of the following, if true, most strengthens the argument?
A. All the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions.
B. In the studies of rats, nondominant individuals were found to increasingly avoid dominant individuals when the animals were in crowded conditions.
C. Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.
D. Some individual monkeys in the experiment were involved in significantly more attacks than the other monkeys were.
E. Some of the coping behavior displayed by rhesus monkeys is similar to behavior rhesus monkeys use to bring to an end an attack that has begun.

How come the answer is C? Can someone please explain the reasoning?
[Reveal] Spoiler: OA

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08 Nov 2011, 17:25
Difficult one becasue only C and E options are little relevant to conclusion.

I'll pick E because increase in instances of “coping” behavior shows that few of the rhesus monkeys were showing submissive gestures to avoid the fight and hence less attacks.

Hope it helps!
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08 Nov 2011, 23:12
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Premise: Experimentation done on Rhesus monkeys
Conclusion:
For any species of monkey,crowding DOES NOT increases aggression as significantly as was seen in rats.

The argument is a weak one as the conclusion does not follow directly from the premises - The argument generalizes results found on Rhesus monkeys with what will happen to all other species monkeys.

C strengthens the argument by stating that Rhesus monkeys are the most aggressive ones; other species will not be any more aggressive. Hence the findings on Rhesus monkeys is the worst case scenario .

Crick
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09 Nov 2011, 01:23
Thanks crick20002002. It all makes sense now.
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09 Nov 2011, 04:39

If Monkeys are the most aggressive creatures then none can attack monkeys and so the monkeys will not become extinct
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09 Nov 2011, 09:06
Ans-C,

The conclusion is-Therefore it is not likely that, for any species of monkey,
crowding increases aggression as significantly as was seen in rats.

C.Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do-Option C indicates that Rhesus are those species of monkey which respond with agression the most but these species did not show much agression in crowded conditions. Hence it implies that other species would also not respond that much.
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27 Dec 2011, 23:52
Yes I agree with Babzsn84. That helps explain why C is the answer. If the experiments were performed on the most aggressive monkey species and yet this monkey species was found to be less aggressive than rats, in general, then the conclusion that monkeys, in general, are less aggressive than rats in the 'crowding' scenario is strengthened.
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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11 Feb 2014, 02:03
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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12 Feb 2014, 10:52
1. PREMISE---Studies of rats found that crowding increases the number of attacks among the animals significantly.
2. PREMISE-----In recent experiments INVOLVING rhesus monkeys, attacks did not become any more frequent.
CONCLUSION------ It is not likely that, for any species of monkey, crowding increases aggression as significantly as was seen in rats.
ASSUMPTION-----
1. In rhesus monkeys, Attack BEHAVIOR is more prevelant than other MONKEYS.
2. Other monkeys will not exceed the rhesus monkeys in attack/aggressive behavior in crowding....

C. Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.CORRECT
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In 1960’s studies of rats, scientists found that crowding increases [#permalink]

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26 Sep 2014, 20:40
In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, although there was an increase in instances of “coping” behavior—such as submissive gestures(signals) and avoidance of dominant individuals—attacks did not become any more frequent. Therefore it is not likely that, for any species of monkey, crowding increases aggression as significantly as was seen in rats. Which of the following, if true, most strengthens the argument?
A. All the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions.
B. In the studies of rats, non-dominant individuals were found to increasingly avoid dominant individuals when the animals were in crowded conditions.
C. Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.
D. Some individual monkeys in the experiment were involved in significantly more attacks than the other monkeys were.
E. Some of the coping behavior displayed by rhesus monkeys is similar to behavior rhesus monkeys use to bring to an end an attack that has begun.
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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26 Sep 2014, 22:24
Raihanuddin wrote:
In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, although there was an increase in instances of “coping” behavior—such as submissive gestures(signals) and avoidance of dominant individuals—attacks did not become any more frequent. Therefore it is not likely that, for any species of monkey, crowding increases aggression as significantly as was seen in rats. Which of the following, if true, most strengthens the argument?
A. All the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions.
B. In the studies of rats, non-dominant individuals were found to increasingly avoid dominant individuals when the animals were in crowded conditions.
C. Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.
D. Some individual monkeys in the experiment were involved in significantly more attacks than the other monkeys were.
E. Some of the coping behavior displayed by rhesus monkeys is similar to behavior rhesus monkeys use to bring to an end an attack that has begun.

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In 1960 s studies of rats, scientists found that crowding [#permalink]

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19 Oct 2014, 07:27
Although i got it wrong,on closer inspection found out that the conclusion is for all species of monkeys which makes C the clearest choice.C mentions the fact that Rhesus monkeys are the most reactive to the widest range of stimuli.So it can be interpreted as:
If Rhesus monkeys being the most reactive DO NOT respond to overcrowding by being more violent,then it is likely that no other species of monkeys will react to overcrowding.Therefore it strengthens the argument by clearing out an underlying assumption that behaviour of rhesus monkeys can be extrapolated to all monkey species
Hope this kind of explains C.
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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16 Dec 2015, 11:55
Hello from the GMAT Club VerbalBot!

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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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16 Dec 2015, 12:37
enigma123 wrote:
In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, although there was an increase in instances of “coping” behavior—such as submissive gestures and avoidance of dominant individuals—attacks did not become any more frequent. Therefore it is not likely that, for any species of monkey,crowding increases aggression as significantly as was seen in rats.

( in 1960s ) Rats - Crowding increases number of attacks
( Recent Experiments ) Rhesus monkeys - Coping behaviour , frequency of attacks did not increase.

Any species of monkey , crowding increases aggression.

The flow of information is from the Premises ( Rats and Rhesus monkeys ) monkeys to the Conclusion ( Any species of monkey )

Attachment:

Untitled.png [ 3.59 KiB | Viewed 2427 times ]

If we apply the concept of pre thinking the first thing which must strike us is that " There must be some behavorial characteristics of the animals under consideration "

C leads to the same -

Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.

So, Rhesus monkeys also respond with aggression but under a different stimuli ( might be for food or any other issue ) and adopt the coping behaviour under stimulus such as " crowded conditions "

So, we can come to the conclusion that " It is not likely that, for any species of monkey,crowding increases aggression as significantly as was seen in rats."
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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21 Dec 2015, 01:49
Premise: Rat in crowded – rise attacks among them. But Rhesus monkey in crowed – attacks no increase.
Conclusion: Not all monkey increases aggression in crowded like rat.
Choice A and B weaken the argument. Choice E is irrelevant. Choice D, “some individual monkeys” do not impact on the argument (species).
Choice C: Rhesus monkeys react to aggression from low number of attacks to high number of attacks. It strengthens the conclusion Not all monkey increases aggression in crowded.
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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30 Jan 2016, 11:38
Gnpth or enigma123, could you please edit the question and delete the part that gives a hint about the OA?

"How come the answer is C? Can someone please explain the reasoning?"

enigma123 wrote:
In 1960’s studies of rats, scientists found that crowding increases the number of attacks among the animals significantly. But in recent experiments in which rhesus monkeys were placed in crowded conditions, although there was an increase in instances of “coping” behavior—such as submissive gestures and avoidance of dominant individuals—attacks did not become any more frequent. Therefore it is not likely that, for any species of monkey,
crowding increases aggression as significantly as was seen in rats. Which of the following, if true, most strengthens the argument?
A. All the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions.
B. In the studies of rats, nondominant individuals were found to increasingly avoid dominant individuals when the animals were in crowded conditions.
C. Rhesus monkeys respond with aggression to a wider range of stimuli than any other monkeys do.
D. Some individual monkeys in the experiment were involved in significantly more attacks than the other monkeys were.
E. Some of the coping behavior displayed by rhesus monkeys is similar to behavior rhesus monkeys use to bring to an end an attack that has begun.

How come the answer is C? Can someone please explain the reasoning?
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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22 May 2016, 15:57
can a moderator go in and edit the question so that the answer is concealed? defeats the whole point of doing the question
Re: In 1960 s studies of rats, scientists found that crowding   [#permalink] 22 May 2016, 15:57
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