http://visualwebsiteoptimizer.com/split-testing-blog/tag/cal...
http://www.campaignmonitor.com/blog/post/3073/a-b-testing-th...
http://thinkvitamin.com/web-apps/how-to-increase-sign-ups-by...
As a hobbyist in the field I find articles like these very interesting. However I find it hard to find larger collections, or even better books on such subjects. So much of what I come across is bloated with crap. Very seldom can I find collection focusing only on the why and how. Any tips?
Everything from there has been sort of copies. I find it more interesting to dig into the human brain and related books. Ie. cognitive psychology and how our brain perceives things. The difference between cultures etc. That's where you really learn the WHY and HOW.
http://voltagecreative.com/articles/web-design-case-study-ap...
I think language matters equally as much - especially if you have primary and secondary text in the button - but these are all hunches, hence the testing. Found a ~80% uplift with 99% confidence just by flipping the primary and secondary text of a button on our homepage (not our primary landing pages) last week. Testing color variations on the improved text now.
source: http://www.formstack.com/the-anatomy-of-a-perfect-landing-pa... (note I don't agree with all of this but there is a good color breakdown). also had some real world advice given to me from a convo with a 500 startups founder a few months back related to orange.