Figure: In the graph above, which includes data from over 130,000 repetitions, newly memorized items are optimally repeated after seven days. However, items that have been forgotten 10 times (which is rare in SuperMemo) will require an interval of two days. (Due to logarithmic scaling, the size of the circle is not linearly proportional to the data sample; the number of repetition cases for lapses=0 is by far larger than for lapses=10, as can be seen in Toolkit : Statistics : Analysis : Distributions : Lapses)
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|current||15:55, 27 April 2009||996 × 650 (120 KB)||WikiSysop||Tools : Statistics : Analysis : Graphs : First Interval shows you exponential regression curve that approximates the length of the first interval for different numbers of memory lapses|
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