A few thoughts on the peer evaluation proposal.
2. I agree. Mapping to rubrics will also let us ask better questions than asking to grade on a scale of 1-10 to improve the reliability, as suggested by Mika. For example, for grading a blog post on open education, questions like whether it talks on scalability (Yes/No), Content is well researched (Yes,No), etc can be asked. I think that using such questions the participation metrics can be accurately and reliably measured by peer evaluation. For measuring the quality - questions like - quality of the post: A. Unsatisfactory = 1 - 4; B. Acceptable = 5 - 6 ; C. Excellent = 7 - 10 ? may be asked as you suggested.
3. I think it would be also good to leave a default and let the course instructor modify it if needed. Many instructors may not want to spend a lot of time configuring the system or think about what is a good distribution, but prefer to use it as is.
- Yes, we would need such a mechanism. We need something which would predict the overall participation in the course based on individual tasks. In my opinion this would not be trivial. There might be some learners who participate in say activities 1 and 3 and others say only in activity 5 (suppose it is the last activity of the course). Now, the last activity may be the only major one in the course while others being trivial. The learners who had participated in the last activity only may have done so as they had some previous experience and for that course it is sufficient participation. How do we decide on the participation of these two type of learners is an important question. We, would need to think of such issues at an individual course level and judge how to aggregate the participation.
4-5. There should be a limited number of these that add up to 100% and should be specified by the course instructor/moderator. But, instead of categories being rated from 1-10, we could also have a whole activity judged by say 10-15 questions of the Yes/No or "Poor"/"Satisfactory"/"Excellent form.
6. Assuming that n people evaluate an assignment we would have n answers/points for a particular category of an activity. It would not be the case if something like the karma system would be used.
7. I agree it is naive to use an absolute deviation of 1.5 points.
8. We could have Self Evaluation along with Peer Evaluation. The workshop module of Moodle requires both to be done. In it, if the self grade is close enough to the peer grade then self evaluated grade is assigned otherwise there is some form of mathematical calibration of the grade. Now, we could also have the teachers grade for a subset of the submissions for each activity. Everyone could be able to flag both self and peer grades based on deviations.
11. Starting off with formative assessment would be great.