Conversion hurdle race
I really like this graphic, but I think that "have confidence that their contributions will be valued and kept" (listed as factor by 25% of respondents) should be listed as a Pre-condition as well, or maybe someplace else I'm not imagining. It was listed by enough respondents that it seems missing from this graphic.
I think that confidence could come from a) better learning procedures and confidence that they understand how to format and cite material so it as acceptable and will be accepted b) better understanding of how to monitor pages and how to understand and respond to input from other editors (including nominations for deletion or critical tags like needs citation or notability) c) better tools for monitoring pages, like getting some form of email notification turned on for wikipedia d) an improved sense that someone friendly will be there to help or guide them e) possibly a way for people to recieve feedback or approval for their editing - letting people rate pages or particular edits, for example. There are awards like barnstars, but no speficic way to earn those rewards.