Which of the following, if true, most seriouslyweak-ens the researcher's conclusion?
15.
A researcher studying drug addicts found that, on average,
they tend to manipulate other people a great
deal more than nonaddicts do. The researcher concluded that people who
frequently manipulate other people are likely to become addicts.
Which of the following, if true, most seriously
weak-ens the researcher's conclusion?
After becoming addicted to drugs,
drug addicts learn to manipulate other people as a way of obtaining drugs.
When they
are imprisoned, drug addicts often use their ability to manipulate other people
to obtain better living conditions.
(C)
Some nonaddicts manipulate other people more than some
addicts do.
(D)
People who are likely to become addicts
exhibit unusual behavior patterns other
than frequent manipulation of other people.
(E)
The addicts that the researcher studied were
often unsuccessful in obtaining what they
wanted when they manipulated other people.
The argument says that "The researcher concluded that people who frequently manipulate other people are likely to become addicts." ---> Manipulation causes addict
A) After becoming addicted to drugs, drug addicts learn to manipulate other people as a way of obtaining drugs. ---> Addict causes manipulation
the cause and effect relationship of answer A is just the opposite of the argument. Hence, A weakens the argument and is the correct answer.
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