They gave their volunteers $US5 or $US20 and half got clear instructions on how to spend it. Those who spent the money on someone or something else reported feeling happier about it.

• 研究人员向志愿者们分发了5美元至20美元金额不等的钱，并向其中一半人说明了该如何花这些钱。结果发现，将钱用于别人或其它事情的人感到更快乐。