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Researchers tested the effects of classical music on concentration by

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Tarun Dokania
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Researchers tested the effects of classical music on concentration by [#permalink] New post   14 May 2019, 20:34
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Researchers tested the effects of classical music on concentration by giving the same tasks to two different groups of 25 each. Group A worked in silence while Bach was played for group B. They found that the group exposed to classical music had a greater efficiency and completion rate than the group that worked in silence. Therefore, music helps increase concentration.

Which of the following would be most useful to determine in order to evaluate the argument?

A) Would instrumental music further increase the efficiency of group B?
B) Were the members of the two groups equally receptive to music?
C) Did conversation lower the efficiency of group A?
D) How effective would group B be in the absence of music?
E) How long was this experiment conducted for?

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Pritam_Pf
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Re: Researchers tested the effects of classical music on concentration by [#permalink] New post   14 May 2019, 23:38
Option B talks about the prerequisite of the experiment.

Isn't is required to evaluate the prerequisite if we want to get the result satisfactory?

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Re: Researchers tested the effects of classical music on concentration by [#permalink] New post   14 May 2019, 23:53
The experiment should affect everyone, regardless of their receptivity. Hence, B is not a pre-requisite. Pritam
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Re: Researchers tested the effects of classical music on concentration by [#permalink] New post   15 May 2019, 00:18
Pritam_Pf wrote:
Option B talks about the prerequisite of the experiment.

Isn't is required to evaluate the prerequisite if we want to get the result satisfactory?

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Let us talk about B:

It says we need to check whether both groups are equally affected by the music.

I think B does not affect the argument more than D.

Even if we say both the groups are not affected equally, that inequality may be very close or very far.

Say, group A gets affected 49.99 % and Group B can be affected 51.11% or vice - versa.

Say, group A gets affected 1% and Group B can be affected 99% or vice - versa.

So this will not help that much in evaluating the case in the question.
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Re: Researchers tested the effects of classical music on concentration by [#permalink]
15 May 2019, 00:18
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