I was wondering if there were any A/B tests carried out for where scroll indicator buttons should be placed. See for example Acquia.com, they have up and down scroll buttons placed, which is good for touch based interfaces. However, these can be placed left or right, I was wondering if there are arguments for either side.
Supporting the case for placing it on the right:
- Normally a user would read, or at least scan, the content before thinking about scrolling. In that scenario it would make more sense to have the scroll buttons on the right side (assuming of course that the content is being read left to right).
- The scroll bar position for vertical scrolling is on the right hand side of the content being scrolled in every OS I can think of.