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== Available tools for memory and sleep analysis ==

To study your memory and sleep, use options available in SuperMemo in the following places: 

*[[Workload]] 
*[[Statistics|Learning statistics]] 
*[[Element data|Element statistics]] 
*[[Analysis]]
*[[Memory graphs (4D)|Memory graphs]]
*[[Repetition history]] 
*[[Sleep Chart]]

== Examples  ==

=== Repetition calendar  ===

You can use '''[[Toolkit menu|Toolkit]] : [[Workload]]''' (''Ctrl+W'') to inspect the daily and the monthly calendar of repetitions. You can view the number of repetitions scheduled, number of scheduled [[Glossary:Topic|topics]], number of scheduled [[Glossary:Item|items]], as well as the record of past repetitions, and past [[Glossary:Retention|retention]], or how many new [[Glossary:Item|items]] were memorized. 

==== Daily workload  ====

[[Image:Daily workload.jpg|center|800px|SuperMemo: Toolkit : Workload : Daily tab showing the record of repetitions executed over a three-month period]]

==== Monthly workload  ====

[[Image:Monthly workload.jpg|center|800px|SuperMemo: Toolkit : Workload : Monthly tab showing the record of repetitions executed over a three-year period]]

=== 4D memory graphs ===

With '''[[Toolkit menu|Toolkit]] : [[Toolkit menu#Memory|Memory]] : [[Memory graphs (4D)|4D graphs]]''' you can visualize your memory in 4D:

<div class="center">
[[Image:Smoothed up stability increase function.jpg|800px|SuperMemo: A 3D graph of the smoothed up SInc[] matrix rotated along the X (Retrievability) axis based on 272 repetition cases for items with difficulty=0.05]]
{{Image:Smoothed up stability increase function.jpg}}
</div>

=== Collection analysis  ===

You can use '''[[Toolkit menu|Toolkit]] : [[Toolkit menu#Statistics|Statistics]] : [[Analysis]]''' (''Shift+Alt+A'') to inspect your [[Glossary:Forgetting_curve|forgetting curves]], daily changes to your [[Glossary:Measured_forgetting_index|measured forgetting index]], superiority of the latest [https://supermemo.guru/wiki/Algorithm_SM-17 Algorithm SM-17] over the previous generation spaced repetition algorithm, your learning [[Glossary:Overload|overload]], and many more: 

==== Forgetting curves  ====

===== Typical exponential forgetting curve =====

[[Image:Forgetting curves.jpg|center|800px|SuperMemo: Toolkit : Statistics : Analysis : Forgetting Curves graphs for 20 repetition number categories multiplied by 20 A-Factor categories]]
{{:Image:Forgetting curves.jpg}}

===== First review forgetting curve =====

[[Image:First forgetting curve.jpg|center|800px|SuperMemo: The first forgetting curve (first repetition for items with no lapses)]]
{{:Image:First forgetting curve.jpg}}

==== Daily changes to the measured forgetting index  ====

<div class="center">
[[Image:Daily measured forgetting index.jpg|800px|SuperMemo: Toolkit : Statistics : Analysis : Use : Efficiency : Forgetting index shows you the changes to the measured forgetting index on individual days]]
{{Image:Daily measured forgetting index.jpg}}
</div>

==== R-Metric ====

<div class="center">
[[Image:Recall metric.jpg|800px|SuperMemo: Algorithm SM-18 performance metric]]
{{:Image:Recall metric.jpg}}
</div>

==== Priorities missed due to overload  ====

[[Image:Topic priority protection.jpg|center|800px|SuperMemo: Toolkit : Statistics : Analysis : Use : Priority protection : Topics shows your actual processing capacity for high-priority topics on individual days]]

=== Collection statistics  ===

You can use '''[[Toolkit menu|Toolkit]] : [[Toolkit menu#Statistics|Statistics]] : [[Statistics]]''' to supervise and understand your learning process: 

[[Image:Statistics.jpg|center|186px|SuperMemo: The Statistics window where the main learning process statistics of the currently opened collection can be readily inspected]]

=== Element data ===

You can use '''[[Toolkit menu|Toolkit]] : [[Toolkit menu#Statistics|Statistics]] : [[Element data]]''' to inspect learning statistics of a given [[Glossary:Element|element]]: 

[[Image:Element data.jpg|800px|center|Element data window after executing a repetition on an item about immunity]]

=== Element repetition history  ===

You can use '''[[Element menu#Learning|Learning]] : Statistics : Repetition history''' (''Shift+Ctrl+H'') (on the [[element menu]]) to inspect the [[Repetition history|history of repetitions]] for individual [[Glossary:Element|elements]]: 

<div class="center">
[[Image:Repetition history.jpg|center|800px|SuperMemo: Repetition history dialog box displaying the history of repetitions for the current element]]
{{:Image:Repetition history.jpg}}
</div>

=== Element memory status ===

You can use '''[[Element menu#Learning|Learning]] : Statistics : Memory status''' (on the [[element menu]]) to see how [[Repetition history|history of repetitions]] translates into the changes in two variables of long-term memory (see also: [https://supermemo.guru/wiki/SuperMemo_Algorithm SuperMemo Algorithm]):

<div class="center">
[[Image:Memory status.jpg|800px|SuperMemo: Changes in two variables of long-term memory]]
{{:Image:Memory status.jpg}}
</div>

=== Repetitions graph ===

Repetitions graph for any [[Glossary:Element_subset|subsets of elements]] can be shown in the [[browser]] with '''[[Browser menu#Tools|Tools]] : Repetitions graph''' on the [[browser menu]]:

<div class="center">
[[File:Repetitions_graph.png|800px|SuperMemo: Time flow of knowledge in the learning process]]
{{:Image:Repetitions_graph.png}}
</div>

=== Sleep Chart ===

You can use '''[[Toolkit menu|Toolkit]] : [[Sleep Chart]]''' (''F12'') to optimize the timing of your sleep as well as the timing of your learning: 

==== Sleep and repetitions timeline ====

Inspect the timeline of repetitions and sleep: 

<div class="center">
[[Image:Sleep and learning timeline.jpg|800px|SuperMemo: SuperMemo: Sleep and repetitions timeline displaying repetitions blocks of the current collection (in red) and sleep blocks (in blue)]] 
{{:Image:Sleep and learning timeline.jpg}}
</div>

Look for the best time for learning or sleep (see [[Sleep Chart]] for details): 

<div class="center">
[[Image:Sleep and learning timeline with optimization data.jpg|800px|SuperMemo: Sleep and repetitions timeline displaying repetitions blocks of the current collection (in red) and sleep blocks (in blue) with recomputed circadian approximations on the current data]]
{{:Image:Sleep and learning timeline with optimization data.jpg}}
</div>

==== Alertness  ====

See how your brain gradually loses its power during the day: 

<div class="center">
[[Image:Alertness homeostatic.jpg|800px|SuperMemo: Toolkit : Sleep Chart : Alertness (H) graph makes it possible for you to visually inspect how grades decrease during the waking day]]
{{:Image:Alertness homeostatic.jpg}}
</div>

==== Two-component sleep model ====

Look for the time of the day that should give you maximum learning power (''Shift+click'' a day in the sleep timeline). See when your learning is not likely to be effective and when you should rather go to sleep: 

<div class="center">
[[Image:Sleep propensity.jpg|800px|SuperMemo: The predictions of the two-component sleep model about the homeostatic and circadian status of your alertness]]
{{:Image:Sleep propensity.jpg}}
</div>