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Researchers compared musicians who frequently improvise to those who exclusively play written music, finding that the improvisers have significantly greater neural density in the prefrontal cortex, a region associated with rapid decision-making. The researchers concluded that engaging in musical improvisation causes structural brain changes that enhance decision-making skills. Consequently, educational policymakers argue that incorporating improvisation into school music programs will improve students' ability to make rapid decisions in novel situations.

Which of the following, if true, most strengthens the educational policymakers' argument?

  1. Prior to receiving any musical training, the musicians who eventually specialized in improvisation and those who specialized in written music exhibited no significant differences in prefrontal cortex neural density.Cevap
  2. B
    Activities that require rapid decision-making in novel situations have been shown to naturally stimulate increased neural density in the prefrontal cortex.
  3. C
    The prefrontal cortex is one of the last regions of the human brain to fully develop, typically not reaching complete structural maturity until a person reaches their early twenties.
  4. D
    Among individuals who do not play any musical instruments, there is a strong positive correlation between frequently listening to improvised music and high performance on rapid decision-making tests.
  5. E
    Any educational curriculum that successfully induces positive structural changes in the brain should be universally adopted by schools regardless of its specific subject matter.

Cevap

The statement establishing that both groups of musicians had identical prefrontal cortex neural density prior to their musical training.
The argument concludes that musical improvisation causes an increase in neural density, which in turn improves rapid decision-making. A classic flaw in this type of causal reasoning (which is based on an observed correlation) is reverse causation: perhaps individuals who already have higher neural density (and better decision-making skills) are simply more drawn to improvisation. The correct answer eliminates this alternate explanation by establishing that both groups had identical neural density before any training began. By ruling out reverse causation, this choice significantly strengthens the claim that the improvisation itself caused the structural changes.

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1
Identify the core argument and its main conclusion.
The main conclusion is that incorporating improvisation into school music programs will improve students' ability to make rapid decisions. The premises rely on a study showing a correlation between improvisation and increased neural density.
Understanding the exact claim being made is necessary to identify what evidence would support it.
2
Identify the gaps or assumptions in the argument's reasoning.
The argument assumes a specific causal direction: that improvisation causes increased neural density (which enhances decision-making), rather than preexisting high neural density causing people to choose improvisation.
Causal arguments based on correlational studies are inherently vulnerable to reverse causation and third-variable problems.
3
Evaluate the options to find the one that bridges the gap or rules out an alternate explanation.
The correct option eliminates the possibility of reverse causation by showing that the two groups started with the same neural density, proving the difference arose after the training.
Ruling out a highly plausible alternate cause is one of the most powerful ways to strengthen a causal conclusion on the LSAT.

Anahtar Kavram

Strengthening Causal Arguments by Ruling Out Reverse Causation
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