Wikipedia:VisualEditor/Why/User Test Data
Using the source editor
"There was tons of foreign jargon amidst the content and it looked nothing like how the real page looked."
"I don't want to have to learn a new language just to edit Wikipedia."
When presented with the source editor, users tended to have the same set of problems. Many of these centred around identifying what they were expected to change; with so much markup, they found it difficult to identify things in the markup view that matched what they'd seen when reading the rendered page. Users were also worried by the clutter of the editing interface, particularly the mass of buttons at the bottom of the "save page" window.
Users struggled to understand the wikimarkup found in a moderately-sized article; when they managed to identify bits, it was almost entirely from comparing their memory of the rendered page to individual words, and looking at the formatting around those words (for example, noting that all of the headers had equals signs, and thus determining that equals signs made headers work). With one exception, every user found the source editor intimidating and would opt not to use it.