PT134.S2.Q20 > Question

SECTION 1 · lr

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SECTION 2 · lr

SECTION 3 · lr

SECTION 4 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6

PASSAGE 2

Question 7 Question 8 Question 9 Question 10 Question 11 Question 12

PASSAGE 3

Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19

PASSAGE 4

Question 20 Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

The influence that the amygdala has on the cortex is greater than the influence that the cortex has on the amygdala, because the neural connections in the former are more well-developed.

The author has made a conclusion about comparative influence, but has only supported this with a statement about comparative development. For the conclusion to validly follow from the premises, we need to know that influence on the amygdala and cortex is directly impacted by the development of neural connections.

We are discussing the influence of amygdala on cortex, and of cortex on amygdala. We aren’t talking about overall brain influence. Also, (A) does not define in what way the amygdala influence is dependent on cortex influence.

(B) does not guarantee the author’s conclusion. The amygdala can win first prize for cortex influence, like (B) says, and the cortex could still have more influence on the amygdala (contrary to our conclusion).

We are comparing amygdala-to-cortex influence vs. cortex-to-amygdala influence. We are not comparing X vs. Y vs. Z influences on the cortex, nor do we know which region of the brain has the most highly developed connections to the cortex.

Whether the amygdala is or isn’t controlled by other regions of the brain doesn’t affect the argument. The amygdala can be entirely self-piloting, like (D) says, and the cortex-to-amygdala influence could be greater (contrary to the conclusion), so (D) does not guarantee the conclusion.

This is what we predicted, and it allows the conclusion to be validly drawn. If (E) is true, then the fact that the amygdala-to-cortex pathway has more well developed connections than cortex-to-amygdala means that amygdala will have more influence on the cortex than vice versa.

PrepTest 134 - Section 2 - Question 20

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