A researcher discovered that people who have low levels of immune’ system activity tend to score much lower on tests of mental health than do people with normal or high immune’ system activity.The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease.
The researcher's conclusion depends on which of the following assumptions?
(A)High immune.system activity protects against mental illness better than normal immune, system activity does.
(B)Mental illness is similar to physical disease in its effects on body systems.
(C)People with high immune-system activity cannot develop mental illness·
(D)Mental illness does not cause people's immune-system activity to decrease.
(E)Psychological treatment of mental illness is not as effective as is medical treatment
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A typical necessary assumption question.
Fact: Correlation of poor immune system and poor mental health. These two events happen together. Conclusion: immune system protects against mental illness as well as against physical disease. One event causes the other event.
However, when events A and B happen together, the possibilities are: 1) A causes B; 2) B causes A; 3) a third event C causes both A and B. When the argument concluded that presence of poor immune system CAUSES poor mental health, the argument also assumes that poor mental health does not cause poor immune system.
And answer (D) speaks just that. Right answer.
请问作者什么时候推出的这个结论?在结论里作者没有说 poor immune system CAUSES poor mental health 啊,只是说免疫系统能防止得精神疾病,也防止身体疾病。 这个CAUSES的关系是怎么的得出来的? |