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A survey of a group of people between the ages of 75 and 80 [#permalink]
04 Jan 2004, 19:32
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12. A survey of a group of people between the ages of 75 and 80 found that those who regularly played the card game bridge tended to have better short-term memory than those who did not play bridge. It was originally concluded from this that playing bridge can help older people to retain and develop their memory. However, it may well be that bridge is simply a more enjoyable game for people who already have good short-term memory and who are thus more inclined to play.
In countering the original conclusion the reasoning above uses which one of the following techniques?
(A) challenging the representativeness of the sample surveyed
(B) conceding the suggested relationship between playing bridge and short-term memory, but questioning whether any conclusion about appropriate therapy can be drawn
(C) arguing that the original conclusion relied on an inaccurate understanding of the motives that the people surveyed have for playing bridge
(D) providing an alternative hypothesis to explain the data on which the original conclusion was based
(E) describing a flaw in the reasoning on which the original conclusion was based .
Very confusing. I guess we can choose "D" as the best. "D" correctly points out what the author does in the argument....the author points out an alternative hypothesis. He/she doesnt actually say there is a flaw in the reasoning of the argument.....the author just gives another possibility.