I present about Online Persuasion regularly, and here you can find my presentation slides. Other resources (like books, other websites, video's etc.) can also be found at https://www.gui.do/presentation/persuasive-e-commerce. I've given this presentation in short 30-minute form to 3-hour workshops on several e-commerce events in The Netherlands, Germany, France, Poland, Romania, Brazil, Spain and the USA. Although the presentation below without my explanation might leave some open questions here and there, I think it's worthwhile clicking through it if you're interested in the topic. Just place a comment if you need more info or have some feedback. A video version from Meet Magento Germany is also included at https://www.gui.do/presentation/persuasive-e-commerce.
Recently I've seen some (often absolute) statements going around, generally in the line of "open source commerce platforms are a terrible idea". Now of course different solutions always have different pros and cons.
A hierarchy of evidence (or levels of evidence) is a heuristic used to rank the relative strength of results obtained from scientific research. I've created a version of this chart/pyramid applied to CRO which you can see below. It contains the options we have as optimizers and tools and methods we often use to gather data.