Astronauts who experience weightlessness frequently get : GMAT Critical Reasoning (CR)
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# Astronauts who experience weightlessness frequently get

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Astronauts who experience weightlessness frequently get [#permalink]

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27 Jul 2004, 20:48
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Astronauts who experience weightlessness frequently get motion sickness. The astronauts see their own motion relative to passing objects, but while the astronauts are weightless their inner ears indicate that their bodies are not moving. The astronautsâ€™ experience is best explained by the
hypothesis that conflicting information received by the brain about the bodyâ€™s motion causes motion sickness.

Which one of the following, if true, provides the strongest additional support for the hypothesis above?

(A) During rough voyages ship passengers in cabins providing a view of the water are less likely to get motion sickness than are passengers in cabins providing no view.
(B) Many people who are experienced airplane passengers occasionally get motion sickness.
(C) Some automobile passengers whose inner ears indicate that they are moving and who have a clear view of the objects they are passing get motion sickness.
(D) People who have aisle seats in trains or airplanes are as likely to get motion sickness as are people who have window seats.
(E) Some astronauts do not get motion sickness even after being in orbit for several days.
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27 Jul 2004, 21:13
Tough one .. took 2.5 mins but not sure if I'm correct
Will go with D by POE
Basically we have to support that conflicting info to brain cause motion sickness.
B and E seem to be out of scope
A describes scenarios where there are no conflicting info to the brain
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27 Jul 2004, 21:28
The best answer is D - same resoning as srijay.
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27 Jul 2004, 21:29
I'm with C here. 1.5 min
C provides a direct example of motionlessness. Automobile drivers are not moving in their car. Yet, they see objects passing by. This is exactly like astronauts who are not moving but yet see objects passing by
D contradicts the stem because if the argument is true, then people by the window should be more likely to be motion sick than are the people in the aisles
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27 Jul 2004, 23:55

A says "During rough voyages ship passengers in cabins providing a view of the water are less likely to get motion sickness than are passengers in cabins providing no view"

according to the theory:

if the voyage is rough and passengers have a good view of the water => their brains receive no conflicting information => no seasickness expected (A says there is in fact little seasickness)

if the voyage is rough and passengers do not have a good view of the water => their brains receive conflicting information => seasickness expected (A says seasickness is observed)
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28 Jul 2004, 02:41
'll go with A...A illustrates conflict in the brain....
when passengers are provided no view, their brain will think that they are not moving...but infact they are moving...
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28 Jul 2004, 03:50
IMO (C) is best.

(A) During rough voyages ship passengers in cabins providing a view of the water are less likely to get motion sickness than are passengers in cabins providing no view. "Out because this weakens the argument, here the concept of relativity is no longer observed as is required by the argument"
(B) Many people who are experienced airplane passengers occasionally get motion sickness. "Again weakens the argument, if they get occasional motion sickness then at other times they don't, which directly contradicts the argument"
(C) Some automobile passengers whose inner ears indicate that they are moving and who have a clear view of the objects they are passing get motion sickness. "This clearly supports the fact that relative motion and what inner ear sends a messsage to brain has effect on an individual"
(D) People who have aisle seats in trains or airplanes are as likely to get motion sickness as are people who have window seats. "Again weakens the argument, as per this choice there is no difference between reponse of people who experience relative motion and people who do not"
(E) Some astronauts do not get motion sickness even after being in orbit for several days. "Again weakens the argument"[/b]
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28 Jul 2004, 08:37
With C, same reasoning as Paul's.
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28 Jul 2004, 08:52
tough on indeed
Originally I picked C, but upon re-examining my answer, I think A is the right one.

brain receives mix messages, and as a result a person gets nociuos

A) During rough voyages ship passengers in cabins providing a view of the water are less likely to get motion sickness than are passengers in cabins providing no view.

Passengers in the cabin don't have the view of the rocky sea- all they see is four walls, yet their bran tells them they're in motion. Hence they're more likely to get sick than the guys watching the sea -- to their bran, everything is appropriate.

Let's look at C
(C) Some automobile passengers whose inner ears indicate that they are moving and who have a clear view of the objects they are passing get motion sickness.
Well, in this case, inner ears indicate that passengers are moving, as well as their eyes. As a result, brain does not get confused. This choice does not support the original statement, hence it's out.
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28 Jul 2004, 09:47
Iatoshka, your answer got me thinking. However, I think you are misinterpreting the definition of motion sickness.
Motion sickness is defined as the reception of conflicting information regarding body movement vis-a-vis visual perception
Let's now look at the two possible scenarios:
1) ship passengers see outside and they are less likely to be motion sick. If astronauts see outside, then it means that their body is not moving but yet, they see objects pass by --> they should get motion sick. This directly contradicts the premises
2) people NOT seeing outside DO NOT see objects passing by: They should NOT get motion sick because there is no conflict between their motion and what they see. Yet, it says that they are more likely to get motion sick. This again contradicts the premises
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28 Jul 2004, 10:29
Premise 1:
astronauts get motion-sick when they experience weightlessness.
Premise 2:
when weightless, inner ears say that body is not moving, but as astronaunts see relative motion they know they are moving. These conflicting information causes motion-sickness.

now consider choice A:
with view: passengers are on a rough sea, verified at it by looking out from the window. Clean. No conflict. No sickness.
without view: passengers with no-view have a conflciting view on what is happening. rough voyage, but no outside information. Conflicting. Sick!

C --> inner voice says that the passenger is moving, passanger verified it by experiencing relative motion. No conflict. No sickness.

D --> equating window seat passengers to aisle seat passengers. nope!

A is best.
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28 Jul 2004, 10:46
Scary, I will have to look at Iatoshka's analysis in more detail. Thanks for your analysis too Oleg and Dj.
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29 Jul 2004, 18:38
OA is A as dj said and I now see why
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29 Jul 2004, 18:38
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