In several studies done in the US in the 1970's about the sources of stress for children, it can be seen that the death of the parents, divorce, separation, and arguments are indisputable sources of fear for America n children.
在七○年代美國做的許多兒童壓力調查中，就可以看出父母去世、離婚、分居、爭吵等等，是美國孩子心頭揮不去的恐懼來源，如今恐怕更是有過之而無不及。