OK, my entry is finished and available at http://www.gwern.net/Spaced%20repetition#literature-review
(I chose to stick it on my site rather than in a LW Discussion or Article because I think it makes more sense in a context, and because I really hate the edit box on LW - I probably would cut my wrists trying to get the footnotes to work. You may need to force-refresh if you have been there before).
I believe I hit all the points requested except for the research questions - nothing obvious occurred to me that the researchers missed, and there's so much research I'm not sure what they consider really important besides the fixed vs expanding question, which as I explain, is not of much interest to us practical folks.
I think you should make a post which quotes your article and links to it.
Update: the prize is now finished!
The previous contest was poorly formatted for eliciting the most useful reviews of the spaced repetition literature so I've created a new slightly different contest.
I'm interested in making projects happen on Less Wrong. In order to find out what works and to inspire others to try things too, I'm sponsoring the following small project:
Spaced Repetition is often mentioned on Less Wrong as a technique for adding facts to memory. I've started using Anki and it certainly seems to be useful. However, I haven't seen a good summary of evidence on Spaced Repetition and I would like to change that.
I hereby offer a prize, currently $385, to the best literature review submitted by August 1st. 'Best' will be judged by voting with discussion beforehand by the Seattle LW meetup group. People are not allowed to vote for their own submissions.
The summary should address questions such as:
The post should summarize the state of current evidence and provide citations to back up the claims in the article. Referencing both academic and non-academic research is encouraged. Lukeprog's The Science of Winning At Life sequence contains several examples of good literature review posts.
If you think you would benefit from the result of this project, please add to the prize! You can contribute to the prize on the ChipIn page.
If you have suggestions, questions or comments, please leave them in the comments. Prizes demotivating? Due date too soon/far? Specification too vague? Judgement procedure not credible enough?
This project is tagged with the 'project' tag and listed on the Projects wiki page.