本研究在前人对于逐步降级效应的研究的基础上，同时采用二分的因变量和连续的因变量，分别考察在同一维度和不同维度这两种类型的让步中，当采用逐步降级这种依从策略时，逐步降级效应是否存在，以及让步大小对于逐步降级效应是否有影响。研究结果表明:(1)当两个请求的内容和维度相同时，采用逐步降级策略不能改变请求的接受率，但是能够提高请求的接受程度;(2)当两个请求的内容和维度不同时，采用逐步降级策略对于请求的接受并不能起到促进作用;(3)让步大小对于逐步降级效应没有影响。

Based on previous researches on door in the face compliance strategy, the author employs both dimidiate and consecutive dependent variables to examine the effectiveness of the door in the face(DITF) strategy, and whether concession size has an effect on the door-in-the-face effect. These questions are tested respectively on DITF when the two requests are on the same dimension or on different dimensions. The results show that when the two requests are on the same dimension, DITF strategy does not increase the percentage of people who compliance,but it raises the compliance participants’compliance level and extent;but when the two requests are of diverse dimensions, DITF failed to be effective. No concession size effect on DITF effect is found in this research.