When there are a lot of search results they often are paginated. Most search engines I know show 10 results per page. I guess this was born out of an easy technical solution or habit. But I don't know if it is still valid or usable.
Why not 8, or 11? Is 10 an especially easy to remember amount? Or do 10 results fit nicely in two views (one times PageDown) of a page?
For example, I know Google changed the way Google Images work to continue to load new pages when scrolling instead of clicking to a next page. As far as I remember they did this because they noticed people checked far more results (say up to 15) as opposed to the normal/web search (1 to 3) before they were satisfied. Thus it would be good if you could easily see more than 10 results.
Another example. Some search results show a lot more. For example ticket systems, CRMs, email's inboxes, etc. The results fit on one line so it makes sense to make more use of the available space. Results can go from 20 to 50 to 100.
Currently I'm working on a website where you can search for photographers. So we show of their photos. Each search result is quite high in pixel height. Meaning you have to scroll a lot more to get to the bottom of page 1 as opposed to Google. Would it be worth to have less results just because of this?
To sum it up:
- Is there a reason why search results are often split by 10?
- Are there rules for when to show more or less? (i.e. type of media, height, etc.)
- Is there any research done on this topic?
I'm not specifically looking for only research references, I love educated guesses and smart thinking.