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# A researcher discovered that people who have low levels of

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Status: Learning
Joined: 20 Dec 2015
Posts: 1160
Location: India
Concentration: Operations, Marketing
GMAT 1: 670 Q48 V36
GRE 1: 314 Q157 V157
GPA: 3.4
WE: Manufacturing and Production (Manufacturing)
Re: A researcher discovered that people who have low levels of [#permalink]

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08 Aug 2017, 23:51
ritula wrote:
Official Guide for GMAT Verbal Review, 2nd Edition
Practice Question
Question No.: 7
Page: 118
Difficulty:

A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

The researcher’s conclusion depends on which of the following assumptions?

A. High immune-system activity protects against mental illness better than normal immune-system activity does.
B. Mental illness is similar to physical disease in its effects on body systems.
C. People with high immune-system activity cannot develop mental illness.
D. Mental illness does not cause people’s immune-system activity to decrease.
E. Psychological treatment of mental illness is not as effective as is medical treatment.

Premise 1
:A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity.

Conclusion
: The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

D says that the reason for the poor mental health test is low immune system activity .
If this is not true then the argument falls as low level of immune activity is caused by poor mental health and the conclusion drawn would be wrong

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Joined: 04 Aug 2017
Posts: 12
Re: A researcher discovered that people who have low levels of [#permalink]

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20 Aug 2017, 03:23
A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.

Conclusion : Immune system protects against mental illness as well as against physical disease.
A. High immune-system activity protects against mental illness better than normal immune-system activity does. >> Does not address the conclusion and researcher is not relying on a comparison between high and normal immune system
B. Mental illness is similar to physical disease in its effects on body systems. >> Irrelevant
C. People with high immune-system activity cannot develop mental illness. >> Does not address conclusion.
D. Mental illness does not cause people’s immune-system activity to decrease. >> Applying assumption negation, this would remove the entire evidence for conclusion basis i.e. If mental illness causes people's immune-system activity to decrease, then we cannot draw the conclusion from the experiment that immune system protects against mental illness.

E. Psychological treatment of mental illness is not as effective as is medical treatment. >> Irrelevant
Re: A researcher discovered that people who have low levels of   [#permalink] 20 Aug 2017, 03:23

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