# Glossary:Stabilization curve

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- stabilization curve
- shows the dependence of stabilization on retrievability.
- The formula for the
**stabilization curve**: **SInc**=*SInc**e-_{Max}^{Gain*R}- where:
`SInc`

- stabilization (aka*stability increase*) is the ratio of memory stability after and before the repetition`SInc`

- maximum possible increase in memory stability._{Max}`SInc`

depends on current stability and memory complexity (i.e. item difficulty). Maximum stabilization can be achieved at the verge of forgetting_{Max}`Gain`

- a constant that expresses the gain in stabilization with passing time (*gain*is a measure of the spacing effect)`R`

- retrievability, i.e. the expected probability of recall at a given point in time. It is determined by the forgetting curve