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

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

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16 Dec 2015, 10:55
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, 11:37
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 2829 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, 00:49
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, 10:38
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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12 Mar 2016, 11:05
I dont get how C is the answer... The conclusion here is about increase in aggression due to crowding as compared to that of rats.. Other species of monkeys may not respond aggressively to a wider range of stimuli but they could still respond quite aggressively to overcrowding, probably as aggressively as a rat does..

Please let me know where I am going wrong..

Thanks in advance..

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

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12 Mar 2016, 19:14
rs47 wrote:
I dont get how C is the answer... The conclusion here is about increase in aggression due to crowding as compared to that of rats.. Other species of monkeys may not respond aggressively to a wider range of stimuli but they could still respond quite aggressively to overcrowding, probably as aggressively as a rat does..

Please let me know where I am going wrong..

Thanks in advance..

Hi rs47,

Let me clarify your doubt here:

Desired flow of thoughts
1. We know that Rhesus monkeys do not act aggressively as the the rats do.
2. Rhesus monkeys are the most aggressive in nature (this is what option C says)
3. Rhesus monkeys do not become aggressive in over crowded conditions

4. Sine Rhesus monkeys who are the most aggressive of all the monkey species, we can say that other species will also not beome aggresive.
(The final conclusion including the correct assumption)

Does this help?

Last edited by OptimusPrepJanielle on 12 Mar 2016, 23:50, edited 1 time in total.

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

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12 Mar 2016, 22:20
Hi OptimusPrepJanielle, thanks a lot for the response.. Just a small query, how did you arrive at the following premise?

"2. Rhesus monkeys are the most aggressive in nature"

Thanks in advance..

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

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12 Mar 2016, 23:48
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rs47 wrote:
Hi OptimusPrepJanielle, thanks a lot for the response.. Just a small query, how did you arrive at the following premise?

"2. Rhesus monkeys are the most aggressive in nature"

Thanks in advance..

Hi rs47,

I think my language made you misunderstand my response. Sorry for that.
The points 1 2 and 3 are the flow of thoughts (taking into account the option C) which I have written before hand and then 4th point restates the assumption.

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

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15 Mar 2016, 15:23
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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22 May 2016, 14:57
can a moderator go in and edit the question so that the answer is concealed? defeats the whole point of doing the question

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

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30 Jul 2016, 07:40
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eyunni 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.

Please explain your answers.

C is the correct answer.

Amongst all types of monkeys rhesus monkey respond aggressively to a wide range of things. Now it means they get angry often and get angry on a lots of things. They are the angriest of all monkeys. Now if the angriest of all (these rhesus) did not responded aggressively to crowding, the other varieties of monkeys which are comparatively more milder and gentler then rhesus will not also respond to the crowding.

An analogy will be IF a gladiator someone can fight with a ferocious tiger without any fear then it is logical to think that he would NOT be afraid to fight with a goat. Similarly if over crowding is not making rhesus (who gets violent easily) aggressive, then other monkeys might not get aggressive either .
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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26 Jul 2017, 10:27
Merged topics. Please, search before posting questions!
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Re: In 1960 s studies of rats, scientists found that crowding [#permalink]

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04 Oct 2017, 09:03
I got a modified version of the question in GMATPrep EP2. Please have a look at the below question:

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, it was not such attacks that increased significantly,but rather instances of “coping” behavior, such as submissive gestures, avoidance of dominant individuals and huddling with relatives. Therefore the evidence from rhesus monkeys makes it doubtful that crowding significantly increases aggressive impulses in primates.
Which of the following, if true, most seriously weakens the argument?

A. The rhesus monkey is the species of monkey that is most prone to fighting.
B. Coping behavior was adopted by the crowded monkeys to forestall acts of aggression among them.
C. All the observed forms of coping behavior can be found among rhesus monkeys living in uncrowded conditions.
D. Some individual monkeys in the experiment were involved in significantly more attacks than the other monkeys were.
E. Some of the rhesus monkeys in the experiments were subjected to levels of crowding that are unlikely to occur in natural circumstances.

[Reveal] Spoiler:
B

Experts please advise.

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Re: In 1960 s studies of rats, scientists found that crowding   [#permalink] 04 Oct 2017, 09:03

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