I wrote a handy FAQ on usability tests that can be reused if anyone is
making a call for volunteers.
Translate UX Participate FAQ:
For the translate UX improvements Pau and I are working on, considerable
time was spent in managing communications and test schedules with
volunteers. Because no volunteer had participated in such a test before,
they often asked for clarifications on preparations they have to make and
the duration. We now point them to this faq and it seems to have helped
resolve common queries and make the tests something to look forward to,
rather than a 'test'.
Feel free to extend this for future tests and pop some feedback for