有童鞋在GMAT考试微博提问：“我想请问一下，假设Verbal部分，做到第37题快没时间了，那是把后面的题都空着分数高一些还是乱蒙全错分数高一些？？？望解惑，谢谢。”

郭凡民博士 (GMAC 心理测评副总裁）给出的答案是： "Here is an analysis Eileen and I did on the GMAT examinee data. It is published on our website. http://www.gmac.com/~/media/Files/gmac/Research/research-report-series/RR0904_GuessWhat.pdf

We looked at guessing vs. omitting. For high ability examinees, guessing seems to result in slightly higher score on the average. However, this might not be true for all individual. Some might get lower scores.

I am not sure there is a pattern for the 乱蒙全错vs.全空着. At least it is not obvious to me. The reason is that it depends on the characteristics of the questions after and before this point and the ability level. My best advice is to try to practice and pace themselves before taking the test, so that they will not force themselves into such situations."