Too much choice?
Originally from Joel Spolsky’s article about the Shutdown menu, to a Slashdot article, and then these links:
Sheena Iyengar studies choice. This paper was suggested (by the poster) as a good place to start. Barry Schwartz has done some work too, and also written articles like this. A short article is here.
Update: There is a video here.
Some people (sensibly) disagree.