At the start of the study, researchers used functional MRI to scan brain activity in the participants, all young adult men, while they completed lab-based tasks involving either emotional or non-emotional content. The participants were then scanned again while they repeated the same tasks after a week of playing the video games.
Researchers found that those who played the violent video games showed less activity in areas that involved emotions, attention and inhibition(抑制) of our impulses(冲动). “Behavioral studies have shown an increase in aggressive behavior after violent video games, and what we show is the psychological explanation for what the behavioral studies are showing,” say Matthews. “We’re showing that there are changes in brain function that are likely related to that behavior.”
It’s not clear how long-lasting the changes may be. When Matthews brought the participants back after a week of not playing video games, their brain activity had changed again, recovering to more normal reactions, but their brain functions still weren’t quite the same as before they were exposed to the violent games.
28. What do we know about the participants?
A. Both teenagers and adults were chosen.
B. The participants had never played any computer games before.
C. 28 participants were all young adult men.
D. The participants were carefully divided into two groups.
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