An example of a great psychological idea: The single best improvement in passenger satisfaction on the London Underground per pound spent came when they didn't add any extra trains nor change the frequency of the trains, they put dot matrix display board on the platforms.
一个很好的心理想法的例子： 伦敦地铁做到的，以花费的英镑来说，最好的旅客满意度提高的服务 不是增加了铁路的数量或铁路的次数， 而是他们所安置在站台上的矩阵显示板。