[求助]gwd-3-9

Jasonhere

实在佩服lawyer

铁甲

这个重点是在于logo的提醒作用（而不是说logo一定导致多tip），选项b证明logo确实有提醒作用。

Hendy

携隐 发表于 2005-6-8 01:55
支持的题目，首先要看懂文章的推理过程，然后注意结论的具体性和特殊性（就是文章的focus到底是什么，讲的 ...

高大上。携隐MM

Hendy

v521 发表于 2006-3-8 20:40
其实前面的nn说得已经很清楚了，我说一下不选E得原因：注意原文始终说得是tips增加，而E说得是bills增加， ...

完全正确，不过不能陪你在2006年杀鸡了，时空不能穿越了

cherishhaha

这是在gmatclub上的一个instuctor的解释：There has been a detailed discussion on this question before. Here are my thoughts:

Let's look at the argument:

Argument: Studies show that cash tips left by customers are larger when the bill is presented on a tray that bears a credit-card logo.

Why would that be? Why would there be a difference when the tray has no logo and when the tray has a credit card logo?

Psychologists' hypothesize that seeing a credit-card logo reminds people of the spending power given by the card they have (and that their spending power exceeds the cash they have right now).

We have to support the psychologists' interpretation.

Say, I change the argument a little and add a line:

Argument: Studies show that cash tips left by customers are larger when the bill is presented on a tray that bears a credit-card logo. Patrons under financial pressure from credit-card obligations tend to tip less when presented with a restaurant bill on a tray with credit-card logo than when the tray has no logo.

Now, does the psychologists' interpretation make even more sense. Understand that the psychologists' interpretation is only that 'seeing a logo reminds people of their own credit card status'. The part 'that their spending power exceeds the cash they have right now' explains the higher tips. If we are given that some tip more on seeing that card logo and some tip less on seeing it, it makes sense, right? Different people have different credit card obligation status. Hence, people are reminded of their own card obligation status and they tip accordingly. Hence, option (B) makes the probability of psychologists' interpretation being true stronger because it tells you that in case of very high card obligations, customers tip less. This is what you would expect if the psychologists' interpretation were correct.

It's something like this:
Me: After 12 hrs of night time sleep, I can't study.
Your theory: Yeah, because your sleep pattern is linked to your level of concentration. After a long sleep, your mind is still muddled and lazy so you cant study.
Me: After 4 hrs of night time sleep, I can't study either.

Does your theory make more sense? Sure! You said 'sleep pattern is linked to your level of concentration'. If I sleep too much, my concentration gets affected. If I sleep too little, again my concentration gets affected. So your theory that 'sleep pattern is linked to your level of concentration' certainly makes more sense.


Option (E) (the one that confuses people) is incorrect.
(E) - 'The percentage of restaurant bills paid with given brand of credit card increases when that credit card's logo is displayed on the tray with which the bill is prepared.'

This options supports the hypothesis that card logo reminds people of their own card (not of their card obligations). The psychologists' interpretation talks about the logo reminding people of their card status (high spending power or high obligations).       
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看完之后再结合这个帖子里面的回复，就觉得其实就是关于这个link的验证，这个link就是：看见logo的holder==>tip
然后再看看问题，至少问题要是加强的话，怎么样都要说credit card holder的（感觉有些题目就是，一定要死死地抓住这个加强或削弱的具体对象），因为题目就是在讲 这些holders， 所以A选项说的是 这个effect对non-holders也有效，可是这个跟holders有什么关系呢？
C选项：又在说的是那些没有信用卡的人，可是没有信用卡的人不是题目要说的对象。
D选项 ，有一个很重要的前提：in general。讲的是普遍性的客人，至少怎么着都不会是加强。
E选项是一开始就否定了的 。

不过即使是这样，也还是很难理解B选项，除非可以想到作者的关注点在于logo对于credit card holders的影响上。
我也是做错了这道题og15-95，理解了很久，突然觉得这可能是一种gmat想要我们习得的一种能力，就跟那道og15-62题的hypnotized subjects题目一样，为什么被催眠说自己是聋了的人，当被问道自己能不能听见的时候，都统一回答不能。
两道题都是精华啊，mark一下。