By one year, there was no meaningful difference between the two groups overall. Low-income boys appeared to get the most short-term benefit.
“That’s important because they are at the greatest risk, both for being perpetrators of aggression(侵害) in real life, but also being victims of aggression,” Christakis said.
The study also has some weakness—the parents weren’t told the purpose of the study, but they probably figured it out and that might have affected the results. Though the results were modest and faded over time, they may hold promise for finding ways to help young children avoid aggressive, violent behavior.
9. The passage is written to _________
A. describe kids’ different behavior
B. inform parents of their kids’ behavior
C. persuade parents not to let kids watch TV
D. offer some useful tips to improve kids’ behavior
10. The word ”Perpetrators” in Paragraph 7 probably refers to _______.
A. people who do something wrong or bad.
B. people who suffer a lot in real life.
C. victims who are killed in a fight.
D. criminals who are sentenced to death.
11. What does the author think of the study?
A. Imperfect but valuable.
B. Perfect but time-consuming.
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