Question

对一件事情预估的时间总是短于实际用到的时间，我记得这是一个心理学定论，这定律叫什么？

Answer 1

墨菲定律。
1、任何事都没有表面看起来那么简单；
Nothing is as simple as it seems.
2、所有的事都会比你预计的时间长；
All things will be a long time than you expect.
3、会出错的事总会出错；
Anything that can go wrong will go wrong.
4、如果你担心某种情况发生，那么它就更有可能发生。　
If you are worried about some sort of happens, then it is more likely to occur.

Answer 2

连锁效应

Answer 3

期待效应