regressive

这种育儿方式可能会引发孩子的退行行为。

This parenting style may trigger ___regressive behaviors in children.

考试压力下，她出现了咬手指这种退行性行为。

Under exam stress, she showed ___regressive behaviors like nail-biting.

压力大的时候，她会出现像摔玩具这样的退行性行为。

Under stress, she displays ___regressive behaviors such as throwing toys.