Reading ComprehensionDifficulty: Easy

PT148 S2 P4 Q22 Explanation

Brain Scans

A free, expert breakdown of this official LSAT Reading Comprehension question.

TopicsAuthor OpinionScience

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Passage

There are some basic conceptual problems hovering about the widespread use of brain scans as pictures of mental activity. As applied to medical diagnosis (for example, in diagnosing a brain tumor), a brain scan is similar in principle to an X-ray: it is a way of seeing inside the body. Its value are instantiated in localized brain regions. This premise is known as the modular theory of mind.

It may in fact be that neither mental activity, nor the physical processes that constitute it, are decomposable into independent modules. Psychologist William Uttal contends that rather than distinct entities, the various mental processes are likely to be properties of a more general mental activity that is distributed throughout the brain. It so for a reason. To cleanly separate emotion from reason-giving makes a hash of human experience.

But if this critique of the modular theory of mind is valid, how can one account for the fact that brain scans do, in fact, reveal well-defined areas that “light up” in response to various cognitive tasks? In the case of functional magnetic resonance imaging (fMRI), what you are seeing when you remains after the subtraction represents the metabolic activity associated solely with the cognitive task in question.

One immediately obvious (but usually unremarked) problem is that this method obscures the fact that the entire brain is active in both conditions. A false impression of neat functional localization is given by differential brain scans that subtract out all the distributed brain functions. This subtractive method produces striking images of the it is illustrated so well by the products of the subtractive method?

What this question is testing

Author Opinion

Your task

Pin down exactly what the question asks about the passage — a detail, the author's view, the structure, or the main point — before looking at the choices.

Common trap

Answers that restate a true detail from the passage but don't answer the specific question being asked.

Winning move

Anticipate the answer in your own words from the passage, then find the choice that matches that prediction.

Reading along? Open the full official question in LawHub — we show a fragment here and keep the reasoning in our own words.

The question
22.

The author of the passage would be most likely to agree with which one of the following statements

Answer choices

  1. Too Strong: invalid for applications3% picked this

    Because the subtractive method masks distributed brain functions, empirical results derived using the method are

    Nothing in the final paragraph talks about whether the subtractive method images can be used for medical applications. The author is only concerned about how these scans relate to the modular theory of the mind.

  2. Opposite7% picked this

    The subtractive method results in images that strongly support Uttal's view that mental processes are simply properties of

    Uttal's view is anti-modular theory of mind. The subtractive method is helping modular theory of mind. So we wouldn't say that the subtractive method strongly supports Uttal's view.

  3. Opposite, if anything2% picked this

    Brain scans of individuals experiencing anger that were produced using the subtractive method show that emotions are not

    Brain scans using the subtractive method (falsely) show that brain processes neatly localized in certain areas. So they would be likely to show that emotions are seated in the amygdala, since that would be showing that a brain process is localized in a certain area. There's certainly nothing in the final paragraph suggesting that anger is / isn't seated in the amygdala.

  4. Correct79% picked this

    The subtractive method seems to strongly support the modular theory of mind because it creates an illusion that

    Why this is right

    This nicely matches up with our last paragraph Support Window: - Isn't the modular theory of mind ultimately attractive in part because it is illustrated so well by the products of the subtractive method? That gets us "The subtractive method seems to strongly support the modular theory of mind". - A false impression of neat functional localization is given by differential brain scans that subtract out all the distributed brain functions That gets us "the subtractive method creates an illusion that brain functions are localized". The only other thing to support is the causal connector, "because". Common sense supports that. The modular theory of the mind claims that different brain functions are localized in different areas of the brain. And the subtractive method scans give off the false impression that brain functions are localized in certain parts of the brain. So the subtractive method supports the modular theory by making it seem like brain functions are localized.

    Skill tested: Author Opinion · how this choice captures the passage's function is the move to repeat next time.

  5. Wrong Objection9% picked this

    The view that the subtractive method depicts differential rates of oxygen use in the brain is based on a

    According to this answer, the author thinks that it's incorrect to think that the subtractive method depicts differential rates of oxygen. But the author is never fighting that idea. She understands that some areas of the brain are using more oxygen in State 1 than in State 2, and she understands that the subtractive method shows the differential rate of oxygen use. Our author would say, "The view that the subtractive method depicts which parts of the brain are involved in a given task/feeling is based on a misconception of the method".

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