锚定效应就是判断靶子大小时先前数字影响判断结果的现象。自从1974年它被发现后，就不断地被各种各样的材料发现；同时，研究者认为它可能是其他心理现象的一个潜在原因，譬如过度归因、概率的保守判断、相信虚假信息，以及后视，所以理解锚定效应也将有助于解开其他心理现象的秘密。但是非常遗憾的是，国内针对锚定效应的研究还是空白。 本研究包括3个实验，由浅入深的探讨了锚定效应的基本现象。实验1验证Tversky和Kahneman提出的锚定效应；实验2发现使用可行锚时，锚定效应发生，预警不会影响锚定效应，这和Wilson等人的发现一致；实验3发现，对于不可行锚，锚定效应依然发生，但是预警会显著的影响锚定效应，与Wilson等人的发现出现分歧，作者分析认为，这是因为Wilson等人使用的锚是可行锚的缘故，他们对不可行锚的情况并未涉及，还有可能与他们的研究范式有关。

Anchoring effect is a phenomena that as we judge the number of the target the former number may influece our judgment. Since 1974, it has been found in various materials. Besides, researchers consider it to be one of the potential causes of other psychological phenomena, including overattribution, conservative judgment of probability, believing in false information, adn hindsight. Thus, understanding anchoring effect may help to reslve the myths of other psychological phenomena as well. But it is a pity that it is still a blank area in national research. This research consists of 3 experiments, discussing the anchoring phenomena. Experiment 1 proved the anchoring effect first claimed by Tversky and Kahneman. Experiment 2 showed that when we used the plalusible anchor, anchoring effect happened, and the forwarning manipulation didn't change subject's numerical estimation, consistent of Wilson etc. Experiment 3 demonstrated that for the implausible anchor, anchoring effect stil took place, but the forwarning instruction may significantly influence it, inconsist of Wilson et al's finding. The author considered that it was because the anchor used by Wilon et al is the plausible one, and in fact they don't discuss what happen for implausible one. Besides, it may be relevant with their research paradgim.