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A researcher discovered that people who have low-levels of

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Manager
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A researcher discovered that people who have low-levels of [#permalink]

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18 Jan 2007, 04:24
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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 researcherâ€™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 effect on body systems
(C) People with high immune-system activity cannot develop mental illness
(D) Mental illness does not cause peopleâ€™s immune-system activity to decrease
(E) Psychological treatment of mental illness is not as effective as is medical treatment
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18 Jan 2007, 05:11
D is my answer. If the mental illness decreates the immunity, then level of immunity can't be used as a mesure to see whether immunity can protect against mental illness.
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18 Jan 2007, 05:32
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18 Jan 2007, 11:29
aurobindo wrote:
D is my answer. If the mental illness decreates the immunity, then level of immunity can't be used as a mesure to see whether immunity can protect against mental illness.

D for the same reasoning.
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18 Jan 2007, 13:21
D....negate this and the argument falls apart.... causal relationship is reversed in this option
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18 Jan 2007, 20:28
aurobindo wrote:
D is my answer. If the mental illness decreates the immunity, then level of immunity can't be used as a mesure to see whether immunity can protect against mental illness.

AgreeD
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18 Jan 2007, 23:13
D !
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19 Jan 2007, 00:29
OA is D
19 Jan 2007, 00:29
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