AbdurRakib
The Official Guide for GMAT Verbal Review 2018
Practice Question
Critical Reasoning
Question no. 182
Psychologist: In a study, researchers gave 100 volunteers a psychological questionnaire designed to measure their self-esteem. The researchers then asked each volunteer to rate the strength of his or her own social skills. The volunteers with the highest levels of self-esteem consistently rated themselves as having much better social skills than did the volunteers with moderate levels. This suggests that attaining an exceptionally high level of self-esteem greatly improves one’s social skills.
The psychologist’s argument is most vulnerable to criticism on which of the following grounds?
(A) It fails to adequately address the possibility that many of the volunteers may not have understood what the psychological questionnaire was designed to measure.
(B) It takes for granted that the volunteers with the highest levels of self-esteem had better social skills than did the other volunteers, even before the former volunteers had attained their high levels of self-esteem.
(C) It overlooks the possibility that people with very high levels of self-esteem may tend to have a less accurate perception of the strength of their own social skills than do people with moderate levels of self-esteem.
(D) It relies on evidence from a group of volunteers that is too small to provide any support for any inferences regarding people in general.
(E) It overlooks the possibility that factors other than level of self-esteem may be of much greater importance in determining the strength of one’s social skills.
Researchers measured self-esteem using questionnaire
They then asked each volunteer to rate the strength of his or her own social skills
Volunteers with the highest levels of self-esteem consistently rated themselves as having much better social skills
Conclusion: Attaining an exceptionally high level of self-esteem greatly improves one’s social skills.
Some pre-thinking: We are concluding that self esteem improves social skills. But note that the strength of social skills is judged by the volunteers themselves, not the researchers. We don't know whether people with high self esteem actually do have better social skills. We also don't know whether self esteem improves social skills or social skills improve self esteem.
(A) It fails to adequately address the possibility that many of the volunteers may not have understood what the psychological questionnaire was designed to measure.
Irrelevant. In fact, we would much rather they do not know what we are testing so that they cannot "game" the result.
(B) It takes for granted that the volunteers with the highest levels of self-esteem had better social skills than did the other volunteers, even before the former volunteers had attained their high levels of self-esteem.
It does not assume that people with high levels of self esteem had better social skill before they got high levels of self esteem. In fact, our argument is saying that attaining high levels of self esteem makes them have better social skills.
(C) It overlooks the possibility that people with very high levels of self-esteem may tend to have a less accurate perception of the strength of their own social skills than do people with moderate levels of self-esteem.
Correct. As discussed in our pre thinking, people with high self esteem rate themselves on their social skills. Due to high self esteem, they may be rating themselves better than their actual social skills. So self esteem may not have developed their social skills, it may have just developed their perception of their social skills.
(D) It relies on evidence from a group of volunteers that is too small to provide any support for any inferences regarding people in general.
We don't know the appropriate size of volunteer group.
(E) It overlooks the possibility that factors other than level of self-esteem may be of much greater importance in determining the strength of one’s social skills.
It does not overlook that other causes could be present.
The argument says: This suggests that attaining an exceptionally high level of self-esteem greatly improves one’s social skills.
We don't know what else could greatly improve one's social skills. It just says that self esteem is a contributing factor. It does not say that it is the only contributing factor.
Answer (C)