Studies of brain lateralization in animals have purported to : GMAT Critical Reasoning (CR)
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Studies of brain lateralization in animals have purported to

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Studies of brain lateralization in animals have purported to [#permalink]

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Studies of brain lateralization in animals have
purported to show that, whereas most human beings
are right-handed, about half of any given group of
animals will be “left-handed” (i.e., showing a
preference for their left limbs) and half will be
“right-handed.” This finding is suspect, however; it
has long been noted that dogs will almost always
“shake hands” with the right paw.
Which one of the following, if true, is the strongest
defense against the counterexample of dogs that
“shake hands”?
(A) Dogs are observed to scratch themselves with
the left leg as well as with the right leg.
(B) People who observe dogs “shaking hands” are
observing a behavior that dogs perform only
with a front paw.
(C) Left-handed people sometimes feel
inconvenienced or even stigmatized in a
“right-handed world,” but dogs face no
analogous difficulties.
(D) Dogs that have lost a limb are able to
compensate for the loss, regardless of whether
the limb was lost from the right or left side.
(E) In learning to perform tricks, dogs are
influenced by the behavior of their trainers.
[Reveal] Spoiler: OA

Last edited by soniedarshan on 09 Jun 2013, 19:20, edited 1 time in total.
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Re: Studies of brain lateralization in animals have ........ [#permalink]

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New post 09 Jun 2013, 10:13
I'm going with E. This is my analysis:

(A) Dogs are observed to scratch themselves with the left leg as well as with the right leg.
This choice go against the premise. It remains neutral.

(B) People who observe dogs “shaking hands” are observing a behavior that dogs perform only with a front paw.
This does not influence the answer choice at all.

(C) Left-handed people sometimes feel inconvenienced or even stigmatized in a “right-handed world,” but dogs face no analogous difficulties.
Nope

(D) Dogs that have lost a limb are able to compensate for the loss, regardless of whether the limb was lost from the right or left side.
Does not matter.

(E) In learning to perform tricks, dogs are influenced by the behavior of their trainers.
Bingo. Since trainers being humans (assuming they're all human beings and not dogs themselves) are mostly right-handed based on the lines in the passage, it is safe to say the dogs imitate their trainers when they learn tricks.
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Re: Studies of brain lateralization in animals have ........ [#permalink]

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New post 09 Jun 2013, 10:38
I think E is the correct answer.
con: this finding is suspect. (finding= whereas most human beings are right-handed, about half of any given group of animals will be “left-handed” (i.e., showing a preference for their left limbs) and half will be “right-handed.”)
premise: it has long been noted that dogs will almost always “shake hands” with the right paw.
counter premise: Studies of brain lateralization in animals have purported to show that, whereas most human beings are right-handed, about half of any given group of animals will be “left-handed” (i.e., showing a preference for their left limbs) and half will be “right-handed.”
analysis: it is assumed that dogs almost always shake hands with the right paw because they are right- handed. however if we show that their shaking hands is what they've learned from right handed human beings instead of relating to their brain lateralization, then we defend the argument against the counter example of dogs.


Question stem: Which one of the following, if true, is the strongest defense against the counterexample of dogs that “shake hands”?

(A) Dogs are observed to scratch themselves with the left leg as well as with the right leg. the arguments talks about dogs' shaking hands not leg!

(B) People who observe dogs “shaking hands” are observing a behavior that dogs perform only with a front paw. the argument is discussing about left or right!

(C) Left-handed people sometimes feel inconvenienced or even stigmatized in a “right-handed world,” but dogs face no analogous difficulties. feeling convenience or uncomfortable does not justify the reaction of dogs' shaking hands habit.

(D) Dogs that have lost a limb are able to compensate for the loss, regardless of whether the limb was lost from the right or left side. out

(E) In learning to perform tricks, dogs are influenced by the behavior of their trainers. the correct ans
if we show that what we observe from dogs shake hands is a learned habit from right handed human beings instead of being left or right handed it means we reject the counter example of dogs.
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Re: Studies of brain lateralization in animals have ........ [#permalink]

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New post 09 Jun 2013, 11:15
petrifiedbutstanding wrote:
I'm going with E. This is my analysis:

(A) Dogs are observed to scratch themselves with the left leg as well as with the right leg.
This choice go against the premise. It remains neutral.

(B) People who observe dogs “shaking hands” are observing a behavior that dogs perform only with a front paw.
This does not influence the answer choice at all.

(C) Left-handed people sometimes feel inconvenienced or even stigmatized in a “right-handed world,” but dogs face no analogous difficulties.
Nope

(D) Dogs that have lost a limb are able to compensate for the loss, regardless of whether the limb was lost from the right or left side.
Does not matter.

(E) In learning to perform tricks, dogs are influenced by the behavior of their trainers.
Bingo. Since trainers being humans (assuming they're all human beings and not dogs themselves) are mostly right-handed based on the lines in the passage, it is safe to say the dogs imitate their trainers when they learn tricks.



Good Explaination :-D E it is.
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Re: Studies of brain lateralization in animals have purported to [#permalink]

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New post 10 Feb 2014, 07:40
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soniedarshan wrote:
Studies of brain lateralization in animals have
purported to show that, whereas most human beings
are right-handed, about half of any given group of
animals will be “left-handed” (i.e., showing a
preference for their left limbs) and half will be
“right-handed.” This finding is suspect, however; it
has long been noted that dogs will almost always
“shake hands” with the right paw.
Which one of the following, if true, is the strongest
defense against the counterexample of dogs that
“shake hands”?
(A) Dogs are observed to scratch themselves with
the left leg as well as with the right leg.
(B) People who observe dogs “shaking hands” are
observing a behavior that dogs perform only
with a front paw.
(C) Left-handed people sometimes feel
inconvenienced or even stigmatized in a
“right-handed world,” but dogs face no
analogous difficulties.
(D) Dogs that have lost a limb are able to
compensate for the loss, regardless of whether
the limb was lost from the right or left side.
(E) In learning to perform tricks, dogs are
influenced by the behavior of their trainers.


I marked Option D) and then I realized that I marked D) because I misinterpreted the argument. The Conclusion is "50% of the animals are left handed and 50% of animals are right handed". Both Option A) and D) are indicating that dogs are ambidextrous (Can use both left and right hand) and doesn't strengthen the argument.

Nice question.
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Re: Studies of brain lateralization in animals have purported to [#permalink]

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New post 05 Aug 2015, 20:47
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Re: Studies of brain lateralization in animals have purported to   [#permalink] 05 Aug 2015, 20:47
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