搞定一个人最好的方法，不是请客吃饭，而是坚持“登门槛效应”

Group 1 - The core concept discussed is the "Foot-in-the-door Effect," which suggests that once a person agrees to a small request, they are more likely to agree to a larger request later to maintain cognitive consistency [4][6][8] - The phenomenon was demonstrated in a psychological experiment where participants who initially agreed to a small request were significantly more likely to agree to a larger request later, with a success rate of 55% compared to 17% for those who were not approached with a small request first [7][14] - The application of this effect is widespread, including in scenarios like street surveys or charity fundraising, where small initial requests lead to higher compliance for larger requests [9][12][14] Group 2 - To effectively utilize the "Foot-in-the-door Effect" in improving relationships, it is recommended to start with small, easily acceptable requests, gradually increasing the difficulty of subsequent requests [15] - Requests should be rationalized with logical reasoning to make them more acceptable, as people are more inclined to help when they understand the reasoning behind the request [16][17] - Expressing gratitude and providing positive feedback after a small request is accepted can reinforce the behavior and increase the likelihood of future compliance [18][19]