6 jam flavours to choose from vs. 24 jam flavours to choose from
Too many choices can be paralysing.
See the full study here :
Iyengar, S. S., & Lepper, M. R. (2000). When choice is demotivating: Can one desire too much of a good thing? Journal of Personality and Social Psychology, 79(6), 995–1006. https://doi.org/10.1037/0022-35126.96.36.1995