As discussed here reliability of some charts are dubious. I would like to use such a chart for studying purposes and am looking for something peer-reviewed or as factual as possible. Does it exist?
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I think you can use this graphic:
It is taken from an article from WIRED, Want to Remember Everything You'll Ever Learn? Surrender to This Algorithm. It talks about Piotr Wozniak and his spaced repetition software SuperMemo.
