The more contact the boys had with tobacco smoke the more likely they were to have recognizable behavior problems, such as extreme excitability and aggression.

VOA: special.2009.01.13

And in this quest for what is best, positive psychology does not rely on wishful thinking, self-deception,or hand waving; instead,it tries to adapt what is best in the scientific method to the unique problems that human behavior presents " in all its complexity."

在追求理想状态时，积极心理学不会盲目主观，或自欺欺人;,相反，它尝试用最科学的方法来探究,极其复杂的人类行为所表现出来的,特殊问题“

哈佛公开课 - 幸福课课程节选

It can decrease intelligence, create behavior problems and slow a child's growth.

VOA: special.2009.08.31

have problems with paying attention, controlling their behavior and being overly active.

VOA: special.2010.05.26