摘录一些被大家忽略的GMAC官方信息

小球藻

GMAC认为GMAT成绩比GPA统计上更有预测意义，当然主要原因是GPA是每个学校自己打分，松紧课程难度差异比较大。标准化考试的意义在于把所有差异的申请者放进一个标准的库来竞争。


What do GMAT scores predict?
GMAT scores are a valid predictor of academic performance in the first year of a graduate management program. Since creating the GMAT exam 50
years ago, we have conducted hundreds of validity studies that demonstrate this fact. In the past ten years, we’ve conducted almost 300 studies for
graduate management programs all over the world. The median correlation between GMAT scores and firstyear grades was 0.51 (perfect correlation is 1.0). The median correlation between undergraduate grade point average and
firstyear grades was 0.28. Thus, GMAT scores are generally a better predictor of performance in the first year of business school than
undergraduate grades, though we advise admissions committees to use both when evaluating candidates.


GMAC还觉得GMAT考试信度很高，能够反应真实水平，所以考多次没啥用，当然没有考虑到中国的实际情况。不过也传递给我们一个信息，不一定是取最高成绩，就是如果两次考试成绩相差太多，GMAC可能会认为存在舞弊等行为，院校也得考虑下是不是都采纳。之前CD就有帖子，相差三百分，然后被成绩取消。所以大家尽可能准备好第一次再去考，2次考试的成绩尽量控制在60分之内（真实水平+-30分）


How reliable are GMAT scores?
Test scores actually earned on any given occasion are only an approximation of your true ability. However, our research indicates that you will most likely
earn a Total score within about 30 points of a score reflecting your true ability.Your Verbal and Quantitative scores are probably within 2.9 points of your
true scores. If you take the GMAT exam more than once, you probably will not receive exactly the same scores. “Reliability” indicates the degree to
which you would keep the same score if you were to take the test more than once (perfect reliability is 1.00). The average reliability of the GMAT Total
score is 0.93. Average reliability is 0.87 for the Verbal score and 0.90 for the Quantitative score. Therefore, the reliability of GMAT scores is very high



考试那天记得穿的漂亮点，照相时面带微笑。可能院系会问GMAC要照片和作文。
How do I send my scores to schools?
Approximately 20 days after your test date, your Official Score Report,including the digital photograph you provided at the test center and copies of
your essays, are made available to any graduate management program you designated when you took the GMAT exam. Not all graduate management
programs elect to receive photographs and essays. Once scores are made available, a school you designate can access your scores at any time. If you
have not yet designated schools to receive your scores, or if you want to designate additional schools, visit www.mba.com or call GMAT Customer
Service. We will report results from all tests you took in the last five years.



一般学校看最高和最近，取平均的不多，除非差异太大
How will retaking the GMAT exam affect my chances of admission?
Admissions committees treat multiple scores in a variety of ways. They may use only your highest scores, your most recent scores, or an average of your scores. You should contact schools directly to learn how they use multiple GMAT scores.

事实上如果最近五年没有GMAT考试记录，GMAC也可以寄送5-10年的考分，附带一份提示性说明。部分学校可能会认可，所以好的GMAT成绩或许在申请MBA时都不用retake，取决于院校政策


How long are my GMAT scores valid?
Scores are usually reported up to five years from the date you took the exam.With a special request and for an additional fee, you may report scores up to 10 years from the date you took the exam. However, scores more than five years old will be accompanied by a statement indicating that they must be interpreted with care; many institutions will not accept scores over five years old. On behalf of GMAC, Pearson VUE destroys all scorerecords more than 10 years old.

一年最多考五次...不过应该很少人会考这么多。两次考试日期间隔31自然日（区别于GRE是每个日历月都能考一次）
Q: How often can I take the GMAT exam?
A: You can take the GMAT once every 31 calendar days and no more than five times in a 12-month period.


另外，如果您的考试成绩是 800 分，那么从考试之日起的五年内，您不得再次参加考试。神一般的分数，GMAC直接觉得你五年内都不用再考了


VUE考试中心是我见过最严格的单人机考考场，尤其是北京，VUE中国分公司的所在地。所以大家一定要严格遵守规范，以下是不能在侯考室使用的。主要就是手机关机，不能看辅导材料
Items Not Permitted During the Test Session
No testing aids are permitted during the test session or during breaks, and there is limited space for you to store your personal belongings. Testing aids include but are not limited to the following:

Telephones, cellular (mobile) phones, or other communication devices
Notes
Scratch paper
Calculators or watch calculators
Watches, stop watches, or watch alarms
Personal data assistants (PDAs)
Beepers or pagers
Photographic devices
Stereos or radios
Any other electronic devices that could aid testing
Books or pamphlets
Dictionaries, translators, or thesauri
Pens or any other writing utensils
Rulers or any other measuring devices

作文评分是人工和机器分别独立评，如果差异超过一分，交由第三人评。所以有的考生，2天就收到作文成绩的链接，有的需要一周以上。至于接近1个月的考生，我估计是可能进行额外的反抄袭剽窃检查，强烈建议如果要背模版，尽可能精简，多加一些实质性的临场发挥内容，以应对人工评分

How AWA Is Scored
Each of your essays in the AWA section will be given two independent ratings, one of which may be performed by an automated essay-scoring engine. The automated essay-scoring engine is an electronic system that evaluates more than 50 structural and linguistic features, including organization of ideas, syntactic variety, and topical analysis.

If the two ratings differ by more than one point, another evaluation by an expert reader is required to resolve the discrepancy and determine the final score.
College and university faculty members trained as readers for the AWA will consider the following:

the overall quality of your ideas about the issue and argument presented
your overall ability to organize, develop, and express those ideas
the relevant supporting reasons and examples you used
your ability to control the elements of standard written English
In considering the elements of standard written English, readers are trained to be sensitive and fair in evaluating the responses of examinees whose first language is not English.

If you have reason to believe that your scores for the Analytical Writing Assessment (AWA) portion of the GMAT test are not accurate, you may request that your essays be rescored using the Essay Rescore Request Form

最新版的percentile，总体趋势是考分越来越高，过不了多久，700分就没有90%了
http://www.mba.com/the-gmat/gmat-scores-and-score-reports/what-your-percentile-ranking-means.aspx



半年之内，支付45刀（无论结果是否变化），就可以要求作文重评分，详情见
http://www.mba.com/the-gmat/test-structure-and-overview/analytical-writing-assessment-section/analytical-writing-assessment-rescoring-service.aspx

关于机考CAT评分的官方blog的一篇文章，没做完也不一定影响成绩，只要前面做得好。而且最后十题一般含有一部分测试题并不几分：
详情见
http://www.mba.com/mbacommunity/MBA_com/b/officialgmat/archive/2010/01/13/the-cat-in-the-gmat.aspx

关于是否应该猜题的一篇官方blog
Based on an analysis of thousands of actual GMAT records, the question of whether to guess or leave questions blank (at the end) depends on the number of items you have left, the section you are on (Verbal or Quantitative), and your relative ability. Here is how it breaks down:

If you only have 1 or 2 items left in either section, it doesn’t make much difference if you guess or omit the question. You should finish the item you are on to the best of your ability and not worry about the others.
If you are on the Verbal section, it doesn’t make much difference if you guess when you have up to about 5 questions left. You should finish the item you are on to the best of your ability and not worry about the others.
In the Quantitative section, your odds improve if you guess and complete all the questions rather leave the final questions unanswered. After all, there are fewer questions in this section, so each item left blank in this section comprises a higher proportion of the test than in the verbal section. Guess as smartly as you can, but guess nonetheless—do not leave items blank.
If you have an idea what your relative ability is ahead of time (i.e., you’ve taken a practice test or diagnostic test), then your guess versus omit strategy differs based on where you think you would fall. If your scores tend to be relatively low on the section, leaving the questions blank may actually result in a higher score than getting even the easy questions wrong by guessing. If you are near the top of the scale, you have farther to fall if you omit the items and therefore you should guess. Low ability—omit; high ability—guess; medium ability—see above.
http://www.mba.com/mbacommunity/MBA_com/b/officialgmat/archive/2009/09/17/tactics-and-guessing.aspx

总体来说，数学部分应该尽可能做完，verbal部分最后五题有可能部分测试题，可以猜一猜；另外就是实力比较强，进入高分区题库时应尽可能猜题，而不是没做完；实力比较弱，进入低分区时，空着或许更好。

强烈建议GMAT新手看一下附件GMAT Information Bulletin 中文版哦，可以解决大部分疑问了

茄子想去美利坚

半年内2次考试相差160的飘过。。。

yaoshenmeming

我貌似差了120分。。。

lysdelyon

“两次考试成绩相差太多，GMAC可能会认为存在舞弊等行为，院校也得考虑下是不是都采纳。之前CD就有帖子，相差两百分，然后被成绩取消。。”
介个。。介个。。是在告诉像我这种500+的永无出头之日了么。。。。。。。。。。。。。。。。。。。。。。。。。

庄子o8

偶的作文十天都没消息，担心被xxxx检查了

小球藻

“两次考试成绩相差太多，GMAC可能会认为存在舞弊等行为，院校也得考虑下是不是都采纳。之前CD就有帖子，相差两百分，然后被成绩取消。。”
介个。。介个。。是在告诉像我这种500+的永无出头之日了么。。。。。。。。。。。。。。。。。。。。。。。。。

-- by 会员 lysdelyon (2011/4/23 23:02:51)

那个好像是300多分，反正差距太大了

小球藻

偶的作文十天都没消息，担心被xxxx检查了

-- by 会员 庄子o8 (2011/4/23 23:03:49)

查是好事，不会被机器草菅人命

FHAO

LZ很细心 \(^o^)/~

庄子o8

顶起来！好贴啊~

小唯唯

谢谢楼主分享啊