If you give people a sense of control they're happier with their decisions

It is not only humans who like to choose: animals prefer to have a choice as well. In fact, they choose to choose even if having a choice does not change the outcome. If rats need to select between two paths that lead to food-one path is a straight line and the other subsequently requires them to select whether to go right or left-they choose the latter path. Pigeons do the same thing. Give a pigeon two options: the first is a button to peck that results in grain being dispensed, and the second is two buttons from which it needs to select one to peck in order to receive the same grain, and the bird will pick the option with two buttons. The pigeons quickly learn that the seeds are no different; yet they prefer the seeds that were obtained by making a choice.