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# A recent study that compared most physiological processes

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Intern
Joined: 03 Jul 2014
Posts: 33
Location: United States
Concentration: Finance, Strategy
GMAT Date: 10-17-2014
GPA: 4
WE: Analyst (Insurance)
A recent study that compared most physiological processes  [#permalink]

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27 Feb 2016, 22:33
2
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Difficulty:

25% (medium)

Question Stats:

76% (01:28) correct 24% (01:38) wrong based on 378 sessions

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A recent study that compared most physiological processes of the mentally ill to those of the mentally healthy discovered that persons with minor mental illness are more likely to have sleep disorders than those who are mentally healthy. Such research provided grounds for some scientists to speculate that minor mental illness often causes sleep disorders. Which of the following, if true, most weakens the speculation above?
(A) Some persons with minor mental illness do not have sleep disorders.
(B) Those with minor mental illness are more subject to infectious diseases than mentally healthy persons are.
(C) Sleep disorder is often caused by certain nerve-stimulating drugs or by extreme stress.
(D) Persons with sleep disorders often develop minor mental illness.
(E) Persons without mental illness sometimes have sleep disorders.

In absence of (D), can (C) be a possible answer since it is another possible cause for an effect?

Source: Optimus Prep
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Re: A recent study that compared most physiological processes  [#permalink]

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28 Feb 2016, 00:01
D is the answer ... reversal of causality ... ?
Intern
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Re: A recent study that compared most physiological processes  [#permalink]

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28 Feb 2016, 01:25
nikhiljd wrote:
D is the answer ... reversal of causality ... ?

Yes, D it is. In absence of (D), can (C) be a possible answer since it is another possible cause for an effect?
Director
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Re: A recent study that compared most physiological processes  [#permalink]

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28 Feb 2016, 05:53
nishith17 wrote:
nikhiljd wrote:
D is the answer ... reversal of causality ... ?

Yes, D it is. In absence of (D), can (C) be a possible answer since it is another possible cause for an effect?

Hello C, cannot be answer because it has word "often". Moreover it says sleep disorder is caused by some other reason but does not hints or relates to mental health. In absence of D it can be answer but please avoid such kind haggling because this is not correct way to approach. What you must be knowing is why is D not a correct answer?

Hit Kudos if you like my explanation! Hope it helps!

-AA
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Joined: 25 Dec 2012
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Re: A recent study that compared most physiological processes  [#permalink]

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28 Feb 2016, 06:52
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nishith17 wrote:
A recent study that compared most physiological processes of the mentally ill to those of the mentally healthy discovered that persons with minor mental illness are more likely to have sleep disorders than those who are mentally healthy. Such research provided grounds for some scientists to speculate that minor mental illness often causes sleep disorders. Which of the following, if true, most weakens the speculation above?
(A) Some persons with minor mental illness do not have sleep disorders.
(B) Those with minor mental illness are more subject to infectious diseases than mentally healthy persons are.
(C) Sleep disorder is often caused by certain nerve-stimulating drugs or by extreme stress.
(D) Persons with sleep disorders often develop minor mental illness.
(E) Persons without mental illness sometimes have sleep disorders.

In absence of (D), can (C) be a possible answer since it is another possible cause for an effect?

Source: Optimus Prep

In a weaken question like this,

A Causes B -- Weaken the statement --> B is the cause of A. [i.e B exists before A]

Mental illness cause sleep disorder --> Weaken --> Sleep disorder cause mental illness.
SVP
Joined: 12 Dec 2016
Posts: 1592
Location: United States
GMAT 1: 700 Q49 V33
GPA: 3.64
Re: A recent study that compared most physiological processes  [#permalink]

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06 Sep 2017, 14:47
this is a common pattern about causal relation and the correlation.
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Re: A recent study that compared most physiological processes  [#permalink]

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26 Jan 2019, 00:08
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: A recent study that compared most physiological processes   [#permalink] 26 Jan 2019, 00:08
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