“门槛效应”是一种社会心理现象。它指一个人从接受别人低层次的要求开始,经过引导,逐步达到接受更高层次要求的目标。换句话说,就是将总的较高的奋斗目标,分解成若干个经过努力能够实现的子目标,通过一个一个子目标的实现,来最终实现总目标。美国心理学家弗鲁姆的“期望理论”佐证了这一点。该理论认为:人的积极性,不仅来源于实现目标的价值,更取决于实现目标的概率。学生估计到实现目标的概率很高,便会积 “Threshold effect” is a social psychological phenomenon. It refers to a person from accepting the low-level demands of others, through the guide, and gradually achieve the goal of accepting a higher level requirements. In other words, the total higher goal of struggle is broken down into a number of sub-goals that can be achieved through hard work, and the ultimate goal can be finally achieved through the realization of sub-goals one by one. This is evidenced by the “expectation theory” of the American psychologist Vroom. The theory holds that the enthusiasm of the people depends not only on the value of achieving the goal but also on the probability of achieving the goal. Students estimate the probability of achieving the goal is high, it will plot