Twenge and her colleagues wanted to understand why this change in average wellbeing occurred.
特温格和她的同事们想要了解为什么平均幸福感会发生这样的变化。
2
In fact, when Twenge previously used this data to suggest a screen time effect, some commentators were quick to raise this problem.
事实上，当特文格之前使用这些数据来说明屏幕时间效应时，一些评论者很快就提出了这个问题。
3
Twenge and her colleagues also found that across the key years of 2013-16, well-being was indeed lowest in years where adolescents spent more time online.