Q9:

Studies in restaurants show that the tips left by customers who pay their bill in cash tend to be larger when the bill is presented on a tray that bears a credit-card logo.  Consumer psychologists hypothesize that simply seeing a credit-card logo makes many credit-card holders willing to spend more because it reminds them that their spending power exceeds the cash they have immediately available.

Which of the following, if true, most strongly supports the psychologists’ interpretation of the studies?

1. The effect noted in the studies is not limited to patrons who have credit cards.
2. Patrons who are under financial pressure from their 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.
3. In virtually all of the cases in the studies, the patrons who paid bills in cash did not possess credit cards.
4. In general, restaurant patrons who pay their bills in cash leave larger tips than do those who pay by credit card.
5. 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.

原文有两个观点，一个是SUTDIES一个是 Psychologists， 不大明白题意。如果要支持Psychologist，是否要说明为什么studies 出现的反例的原因。 如果是这个思路，我选了C。

题目讨论的是——用现金付账的消费者给的小费的多少 与 他们看见信用卡logo

的关系（注意：范围是用现金付账的消费者，且拥有信用卡的人），并且心理学家认

为：it reminds them that their spending power exceeds the cash they have

immediately available。

A.说的是这个研究的对象不止是那些有信用卡的人（这个不管是根据相关性也好，还

是根据逻辑推理也好，都很容易排除）

C.说的是给现金小费的人有没有信用卡（可以看成与原文讨论的无关，实在要往推理

上堕落的话，这个选项则驳斥了原文）

D.比较用现金付账和用信用卡付账的人谁给小费给得多（这个不是原文的比较范围）

E.说的是用某个牌子的信用卡的多少的问题（与原文无关）

    这些都排除后就只有B对。如果硬要说它怎么对，则首先范围是正确的，然后那

些有还款压力的人看到logo就想到自己spending power比现在拥有的低，则会少给小

费，它也是在讨论现金付账的消费者给的小费的多少与他们是否看见信用卡logo的关

系，且从反面说明如果这个人没有还款压力的话则会想到自己spending power比现在

拥有的高。