Question Type:
Strengthen
Stimulus Breakdown:
Some researchers did a study to show that emotion impacts singing. Parents sung with and without their children, and other scientists could tell when they were singing to the kids. Hypothesis confirmed!
Answer Anticipation:
Many times, it's good to think about the premises without the conclusion, and see what you think the argument actually proved (not what the LSAT then falsely concludes).
Here, to me, the study shows that parents sing differently when they sing with their kids. That's not the same as the conclusion, which states the difference comes from emotion. Because of this, I'm on the lookout for an answer that connects emotion to this difference in sound.
Correct Answer:
(D)
Answer Choice Analysis:
(A) Out of scope/unnecessary comparison. The conclusion doesn't care about how much emotion, as it does just the presence of emotion.
(B) Too weak. If we knew this group overlapped with the 20% that the researchers incorrectly assessed, then it might be a consideration. Since we don't know if there was an overlap, we don't know what impact this answer would have on the conclusion. This is more of an Explain a Result answer.
(C) Tempting. I can see an argument for this answer, stating that we need to know the baseline is a lack of emotion. However, that's not the case. We just need to know that the emotion they feel while singing with their children is noticeable. If they still feel emotion when singing alone or with other adults, that's fine, as long as it impacts their singing differently (e.g., it's a different emotion, or affects singing differently).
(D) Bingo. This answer choice explains differences in singing could be caused by emotion. Since that was the gap we were trying to strengthen, knowing how it works gives us reason to believe it happened here.
(E) Out of scope. The argument only requires that the difference exists; whether the parents believed it exists doesn't matter.
Takeaway/Pattern: By using the given premises to come to your own conclusion and comparing that to the actual conclusion, you can sometimes make it easier to find the gap.
#officialexplanation