斯坦伯格把朋友加进来的情况下：当他带着青少年的朋友到房间来观看时，青少年冒险的机率提高了两倍，在之前他会停下来的亮灯的地方现在会拼命冲过去。

In this case Steinberg added friends: When he brought a teen's friends into the room to watch, the teen would take twice as many risks, trying to gun it through lights he'd stopped for before.

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