Document how DR does recruiting for user studies that involve active editors in the Design Research space on MediaWiki.org. Probably goes here: https://www.mediawiki.org/wiki/Participant_Recruiting

The process used by the Growth team (RIP) was something like:

1. document study on the Research namespace on Meta
2. post an announcement on a public forum about the intent to recruit, the recruitment mechanism and criteria, and link to document on meta. The public forum could be a noticeboard on the relevant wiki(s) or a relevant mailing list
3. wait a week (if possible) to let people opt out and/or ask questions about the study
4. send recruitment messages via MassMessage (preferred) or email (if necessary)

The message should include a link/email that people can use to opt-out of this and future research recruiting messages. I suggest we create an opt-out survey so that we can keep all our opt-outs together (tho that would be a separate Phab task).

Here's an example of a message the Growth team sent announcing their VE A/B test. Although this message wasn't about recruitment, many of the same considerations apply: https://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_(miscellaneous)&diff=prev&oldid=662372304