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# Double-blind techniques

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Study Buddy Forum Moderator
Joined: 04 Sep 2016
Posts: 892
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22 Jul 2017, 23:50
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Difficulty:

95% (hard)

Question Stats:

33% (01:18) correct 67% (01:38) wrong based on 381 sessions

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Double-blind techniques should be used whenever possible in scientific experiments. They help prevent the misinterpretations that often arise due to expectations and opinions that scientists already hold, and clearly scientists should be extremely diligent in trying to avoid such misinterpretations.

Which one of the following most accurately expresses the main conclusion of the argument?

A) Scientists' objectivity may be impeded by interpreting experimental evidence on the basis of expectations and opinions that they already hold.

B) It is advisable for scientists to use double-blind techniques in as high a proportion of their experiments as they can.

C) Scientists sometimes neglect to adequately consider the risk of misinterpreting evidence on the basis of prior expectations and opinions.

D) Whenever possible, scientists should refrain from interpreting evidence on the basis of previously formed expectations and convictions.

E) Double-blind experimental techniques are often an effective way of ensuring scientific objectivity.

Source: LSAT
[Reveal] Spoiler: OA

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Study Buddy Forum Moderator
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22 Jul 2017, 23:57
GMATNinja mikemcgarry

I was able to narrow it down to C,B and D.

(D) Incorrect because of phrase - whenever possible

Similarly is (C) out due to phrase - sometimes ?

Let me know if my understanding is correct.
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23 Jul 2017, 11:29
This doesn't seem like a legit GMAT question. What is the source of the question?
Study Buddy Forum Moderator
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23 Jul 2017, 17:50
1
KUDOS
Hi pra1785

Yes, this is a Q from LSAT, practice this only after you have good (>70%) accuracy in
difficult OG Qs and need additional practice on 'super' difficult Qs. You may read
this post for details.

Happy studying!
WR,
Arpit
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24 Jul 2017, 10:00
need explanation. i'm really confuse
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24 Jul 2017, 10:42
1
KUDOS
Takdir wrote:
need explanation. i'm really confuse

Good question. You will get it right if you go by the basics. It asks for the MAIN conclusion which is the main sentence of the statement i.e. "Double-blind techniques should be used whenever possible in scientific experiments." All other options except B doesn't point to the main conclusion. Hence option B is thecorrect choice.
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30 Jul 2017, 12:10
1
KUDOS
Expert's post
Takdir wrote:
need explanation. i'm really confuse

As stated by hotshot02, the first sentence represents the conclusion of the passage: "Double-blind techniques should be used whenever possible in scientific experiments." But why?

• {Double-blind techniques} help prevent the misinterpretations that often arise due to expectations and opinions that scientists already hold.
• Scientists should be extremely diligent in trying to avoid such misinterpretations.
• Therefore, if scientists should try to avoid such misinterpretations and double-blind techniques help to prevent such misinterpretations, "double-blind techniques should be used whenever possible in scientific experiments."

In other words, the author starts with the conclusion and then presents the reasoning to support that conclusion.

GMATNinja mikemcgarry

I was able to narrow it down to C,B and D.

(D) Incorrect because of phrase - whenever possible

Similarly is (C) out due to phrase - sometimes ?

Let me know if my understanding is correct.

Quote:
D) Whenever possible, scientists should refrain from interpreting evidence on the basis of previously formed expectations and convictions.

The author simply claims that double-blind techniques help prevent the misinterpretations that often arise due to expectations and opinions that scientists already hold. The author does not, however, suggest that scientists should refrain from interpreting evidence on the basis of previously formed expectations and convictions whenever possible. Perhaps the author would agree that scientists should sometimes do so and simply advocates using double-blind techniques to avoid the misinterpretations that can result from this approach.

Quote:
C) Scientists sometimes neglect to adequately consider the risk of misinterpreting evidence on the basis of prior expectations and opinions.

Based on the information in the passage, we have no idea whether scientists neglect to adequately consider the risk. Even if they fully consider and understand the risk, there still might be misinterpretations. This choice does not represent the conclusion of the author's argument and should be eliminated.
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21 Dec 2017, 01:13
GMATNinja wrote:
Takdir wrote:
need explanation. i'm really confuse

As stated by hotshot02, the first sentence represents the conclusion of the passage: "Double-blind techniques should be used whenever possible in scientific experiments." But why?

• {Double-blind techniques} help prevent the misinterpretations that often arise due to expectations and opinions that scientists already hold.
• Scientists should be extremely diligent in trying to avoid such misinterpretations.
• Therefore, if scientists should try to avoid such misinterpretations and double-blind techniques help to prevent such misinterpretations, "double-blind techniques should be used whenever possible in scientific experiments."

In other words, the author starts with the conclusion and then presents the reasoning to support that conclusion.

GMATNinja mikemcgarry

I was able to narrow it down to C,B and D.

(D) Incorrect because of phrase - whenever possible

Similarly is (C) out due to phrase - sometimes ?

Let me know if my understanding is correct.

Quote:
D) Whenever possible, scientists should refrain from interpreting evidence on the basis of previously formed expectations and convictions.

The author simply claims that double-blind techniques help prevent the misinterpretations that often arise due to expectations and opinions that scientists already hold. The author does not, however, suggest that scientists should refrain from interpreting evidence on the basis of previously formed expectations and convictions whenever possible. Perhaps the author would agree that scientists should sometimes do so and simply advocates using double-blind techniques to avoid the misinterpretations that can result from this approach.

Quote:
C) Scientists sometimes neglect to adequately consider the risk of misinterpreting evidence on the basis of prior expectations and opinions.

Based on the information in the passage, we have no idea whether scientists neglect to adequately consider the risk. Even if they fully consider and understand the risk, there still might be misinterpretations. This choice does not represent the conclusion of the author's argument and should be eliminated.

Hi GMATNinja!
I was able to rule out A, c and D but between B and E i select E..can you help me rule out option E?
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30 Dec 2017, 17:14
sananoor wrote:
Hi GMATNinja!
I was able to rule out A, c and D but between B and E i select E..can you help me rule out option E?

Quote:
E) Double-blind experimental techniques are often an effective way of ensuring scientific objectivity.

Again, refer to the first sentence: "Double-blind techniques should be used whenever possible in scientific experiments."

Does the author simply want you to believe that double-blind techniques are OFTEN an effective way of ensuring scientific objectivity? This would imply that the author believes that such techniques are sometimes NOT effective. The author doesn't just say, "Yea, double-blind techniques are OFTEN a good choice." Instead, the author says, "Double-blind experimental techniques should be used WHENEVER possible!". That is a much stronger opinion than the one suggested in choice (D).

Choice (B) is more in line with the first sentence.

I hope that helps!
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04 Jan 2018, 20:44
this question type is actually an inference question. The stem is what can be inferred from the passage.
Also, this is a LSAT question, and the question surely is much different from a normal gmat question even though the deduction method is same.
A is out b/c of "impeded" -> nothing is sure about how scientists' objectivity may be impeded
E is incorrect b/c of "effective way"
D is absurd b/c of "refrain"
C has many flaws. First, "we have no idea whether scientists neglect to adequately consider the risk. Even if they fully consider and understand the risk, there still might be misinterpretations. This choice does not represent the conclusion of the author's argument and should be eliminated." Secondly, "sometimes" does not sound good. Lastly, C changes the original meaning.
Re: Double-blind techniques   [#permalink] 04 Jan 2018, 20:44
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