Questions 17-18 Zelda: Dr. Ladlow, a research psychologist, : GMAT Critical Reasoning (CR)
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# Questions 17-18 Zelda: Dr. Ladlow, a research psychologist,

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10 May 2005, 14:55
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Questions 17-18

Zelda: Dr. Ladlow, a research psychologist, has convincingly demonstrated that his theory about the determinants of rat behavior generates consistently accurate predictions about how rats will perform in a maze. On the basis of this evidence, Dr. Ladlow has claimed that his theory is irrefutably correct.

Anson: Then Dr. Ladlow is not responsible psychologist. Dr. Ladlowâ€™s evidence does not conclusively prove that his theory is correct. Responsible psychologists always accept the possibility that new evidence will show that their theories are incorrect.

17. Which one of the following can be properly inferred from Ansonâ€™s argument?
(A) Dr. Ladlowâ€™s evidence that his theory generates consistently accurate predictions about how rates will perform in a maze is inaccurate.
(B) Psychologists who can derive consistently accurate predictions about how rats will perform in a maze from their theories cannot responsibly conclude that those theories cannot be disproved.
(C) No matter how responsible psychologists are, they can never develop correct theoretical explanations.
(D) Responsible psychologists do not make predictions about how rats will perform in a maze.
(E) Psychologists who accept the possibility that new evidence will show that their theories are incorrect are responsible psychologists.

18. Anson bases his conclusion about Dr. Ladlow on which one of the following?
(A) an attack on Dr. Ladlowâ€™s character
(B) the application of a general principle
(C) the use of an ambiguous term
(D) the discrediting of facts
(E) the rejection of a theoretical explanation
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10 May 2005, 18:38
17. Which one of the following can be properly inferred from Ansonâ€™s argument?
(E) Psychologists who accept the possibility that new evidence will show that their theories are incorrect are responsible psychologists.
- E is obviously what Anson is driving at.

18. Anson bases his conclusion about Dr. Ladlow on which one of the following?
(A) an attack on Dr. Ladlowâ€™s character
I'll go with (A) on this one. Anson bases his conclusion on the fact that Dr Ladlow is not a responsible psychologist.
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10 May 2005, 21:03
17) b
18) b

A) Dr. Ladlowâ€™s evidence that his theory generates consistently accurate predictions about how rates will perform in a maze is inaccurate.
(B) Psychologists who can derive consistently accurate predictions about how rats will perform in a maze from their theories cannot responsibly conclude that those theories cannot be disproved.
Yes.

(C) No matter how responsible psychologists are, they can never develop correct theoretical explanations.
(D) Responsible psychologists do not make predictions about how rats will perform in a maze.
(E) Psychologists who accept the possibility that new evidence will show that their theories are incorrect are responsible psychologists.
Wrong.
If A then B. Does not mean If B then A.

Conclusion: Dr. L is not resonsible...

18. Anson bases his conclusion about Dr. Ladlow on which one of the following?
(A) an attack on Dr. Ladlowâ€™s character
wRONG. this is his conclusion not basis of conclusion
(B) the application of a general principle

Yes. His conclusion is based on princile that responsible scientits.......
(C) the use of an ambiguous term
(D) the discrediting of facts
(E) the rejection of a theoretical explanation
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"Forums are meant to benefit all. No one is interested in knowing what your guesses are. Please explain the reasoning behind the answer you chose. This will also help you organize your thoughts quickly during the exam."

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11 May 2005, 00:53
(E) and (B) without doubt.

Initially, for (18), even I thot that the answer shud be (A) since Anson attacks the character of Dr. But on a closer observation found that the conclusion is based on a general principle which Anson states in the end.
So, (B).
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02 Feb 2011, 20:55
E ignores the possibility that psychologists can "accept the possibility that new evidence will show that their theories are incorrect" and still NOT be "responsible psychologists".
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03 Feb 2011, 05:37
1. E is reversal of causality. Inference cannot be in reverse direction.
B by POE

2. B by POE.
Anson follows the principle - "Responsible psychologists always accept the possibility that new evidence will show that their theories are incorrect. "
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03 Feb 2011, 09:10
17) The wording 'cannot responsibly conclude' in B scared me. But E does not sound good either and uses almost same wording as in stimulus, which is always a red flag. So, chose B.
18) Somewhat easier than 17. B. Ladlow applies a general principle. I have seen 'attack on character' as correct answer very rarely even though that answer choice seems to be ubiquitous.
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03 Feb 2011, 23:27
I initially chose E and B. But on closer excmination, its B and B.
Re: CR: Psychologist   [#permalink] 03 Feb 2011, 23:27
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