A large array of options may discourage consumers because it forces an increase in the effort that goes into making a decision. So consumers decide not to decide, and don’t buy the product. Or if they do, the effort that the decision requires detracts from the enjoyment derived from the results. Also, a large array of options may diminish the attractiveness of what people actually choose, the reason being that thinking about the attractions of some of the unchosen options detracts from the pleasure derived from the chosen one.

– Barry Schwartz from The Paradox of Choice: Why More is Less