In my book, Neuro Web Design, What makes them click? I talk about the classic research in the field of choice. Iyengar and Lepper (2000) decided to test out the theory that if you have too many choices you don’t choose at all. They set up booths at a busy upscale grocery store and posed as store employees. They alternated the selection on the table. Half of the time there were six choices of fruit jam for people to try and the other half of the time there were twenty-four jars of jam.

https://www.blog.theteamw.com/2009/11/13/100-things-you-should-know-about-people-10-your-want-more-choices-and-information-than-you-can-actually-process/