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by [email protected] » Sat Apr 26, 2014 8:01 pm
Hi mukherjee.tanuj3,

This is an example of an Evaluation question. The question asks which of the 5 options is relevant in evaluating the information in the prompt. To answer it, we need to know what the prompt is focused on. Here, the question stem hints that there are 2 possible explanations for something - we should focus on the two explanations...

The Logic:
According to the prompt, there are 2 explanations for why scientists over the age of 40 generally do NOT do highly creative work:
1) Higher age leads to less creative capacity
2) Spending too long in a field reduces the opportunity for creative though.

So, the possible explanation comes down to "age" and/or "length of time in a field." We need an answer that focuses on this issue. The only answer that accounts for these possibilities is answer A. That evaluation would help to clarify whether it was the age of the scientist that was the issue or the length of time that they spent in the field.

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by GMATGuruNY » Sun Apr 27, 2014 3:16 am
In many scientific disciplines, scientists generally do not do highly creative work beyond the age of forty, a tendency that has normally been taken to show that aging carries with it a loss of creative capacity. However, by the age of forty most scientists have been working in their chosen field for at least fifteen years, so an alternative explanation is that spending too long in a single field reduces the opportunity for creative thought.

Investigating which of the following would be most useful in choosing between the competing explanations described above?

A. Whether among those scientists who do highly creative work beyond age forty a large proportion entered their field at a considerably later age than is common
B. Whether scientists' choice of research projects tends to be influenced by their own belief that their most creative work will be done relatively early in their career
C. Whether scientists who are older than forty tend to find more satisfaction in other activities, such as teaching and mentoring, than they do in pursuing their own research
D. Whether funding agencies are more inclined to award research grants to scientists who are veterans in their field than to scientists who are relative newcomers
E. Whether there is significant variation among scientific fields in the average age at which scientists working in those fields are at their most productive
Premise: Beyond the age of forty, scientists generally do not do highly creative work.
Conclusion: Spending too long in a single field reduces the opportunity for creative thought.

We are being asked to EVALUATE this conclusion.
The argument assumes that there is LINK between the AMOUNT OF TIME spent in a single field and the production of HIGHLY CREATIVE WORK.
The correct answer choice will either STRENGTHEN or WEAKEN this link.

To understand the answer choices more clearly, rephrase them as STATEMENTS.

Answer choice A, rephrased:
Among those scientists who do highly creative work beyond age forty, a large proportion entered their field at a considerably later age than is common.
This answer choice STRENGTHENS the link between the AMOUNT OF TIME spent in a single field and the production of HIGHLY CREATIVE WORK.

The correct answer is A.
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