Sure, money can't buy you love, but it's hard to imagine that winning rewards won't make us happy.
It does, researchers say, but only if our immediate expectations aren't bigger than the size of the payoff. Disappointment squelches happiness.
"Your happiness increases only if you do better than you expected," says Robb Rutledge, a neuroscientist and senior research associate at University College London. "Just having a bigger salary isn't enough to make you happy."