Say I have a set of photographs and I want to ascertain the most popular one based on a group of people choosing their favourite.
What is the most optimal way of structuring a survey to derive a confident estimate of the most preferred photo with the smallest sample size.
For example would it be better to do...
- Show all photos and ask people to pick their favourite
- Show a subset of photos and ask people to pick favourite
- Some other structure
Does the optimal structure change if you have more options?