# Difference between revisions of "Glossary:Stability increase matrix"

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− | ;<span id=" | + | ;<span id="Stability_increase_matrix">stability increase matrix</span> (SInc matrix; SInc[]) |

:the matrix that represents the function of interval/stability increase in [[SuperMemo Algorithm|Algorithm SM-17]]. For any [[Glossary:Item|item]] at any time, the increase in [[Glossary:Stability|stability]] depends on: | :the matrix that represents the function of interval/stability increase in [[SuperMemo Algorithm|Algorithm SM-17]]. For any [[Glossary:Item|item]] at any time, the increase in [[Glossary:Stability|stability]] depends on: | ||

:#current stability, | :#current stability, |

## Revision as of 08:49, 1 June 2016

- stability increase matrix (SInc matrix; SInc[])
- the matrix that represents the function of interval/stability increase in Algorithm SM-17. For any item at any time, the increase in stability depends on:
- current stability,
- current retrievability, and
- current item difficulty.

- This function can be inspected using:
**Tools : Memory : 4D Graphs : Stability**in SuperMemo. The**SInc[] matrix**can be considered an extension of the OF matrix (from older SuperMemos) into the dimension of retrievability. This means that the new Algorithm SM-17 can handle any repetition at any time, including freshly reviewed items, as well as long-neglected items. Retrievability is the dimension that reflects the time that has elapsed since the last repetition relative to the optimum interval