Quiz

I am researching the use of learner-generated quiz questions, and have used Moodle 1.9 to enable learners create their own questions, and then do the quizzes compiled from a whole classes' questions.

I am interested in any research people might be aware of on this topic, either using Moodle or any other quiz system.

I have identified the papers below, but if anyone is aware of other research, I would be grateful for any pointers.
I am particularly interested in how such exercises are organised (in- or out-of-class, individual or group work, evaluation, etc.)


References:

Barak, M., & Rafaeli, S. (2004). On-line question-posing and peer-assessment as means for web-based knowledge sharing in learning. International Journal of Human-Computer Studies, 61(1), 84-103.

Denny, P., Luxton-Reilly, A., & Hamer, J. (2008, 22-25 January). The PeerWise system of student contributed assessment questions. Paper presented at the Tenth Australasian Computing Education Conference (ACE2008), Wollongong, Australia.

Kavaliauskiene, G. (2003). Learner Generated Quizzes. Teaching English with Technology, 3(3).

Yu, F. Y., Liu, Y. H., & Chan, T. W. (2005). A web-based learning system for question-posing and peer assessment. Innovations in Education and Teaching International, 42(4), 337-348.