I would like to ask a user about his interests. Suppose there are a total of 10-15 (or even more) topics from which the user can choose as many as desired. There might be another section with the same amount of choices.
Which is the better way on mobile devices:
- To limit the number of topics in advance to e.g. 5
- To limit the number of topics in advance but provide a "Show more" button. On click the next 5 topics are shown
- As 2. but on click all remaining topics are shown.
Are there some best practices or other proofen arguments?