Retention Percentage Calculator
Actual retention percentage of independently same qualified items, not infer neuro biological retention from unrelated means. Actual independently matched observations/units and protocol, not diagnosis, causal mechanism, clinical decision or validated individual prediction.
Description
Retention percentage compares retained eligible items with the same initially eligible item set.
Retention percentage compares retained eligible items with the same initially eligible item set.1
This tool computes that percentage from counts without estimating a biological memory mechanism.
When to use Retention Percentage Calculator
This tool computes that percentage from counts without estimating a biological memory mechanism.
How to use Retention Percentage Calculator and how it works
- Prepare retained eligible item count, initially eligible item count, using the input definitions and matching units below.
- Enter the required fields and run Retention Percentage Calculator.
- Read result.value using the units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualRetainedEligibleItemCount | Actual Retained Eligible Item Count. Use the units and matching context stated in the calculation below. | number | Required; integer 0–1000000; finite; other constraints below |
| actualInitiallyEligibleItemCount | Actual Initially Eligible Item Count. Use the units and matching context stated in the calculation below. | number | Required; integer 1–1000000; finite; other constraints below |
Require retained count integer 0–1000000 and initial count integer 1–1000000, with retained<=initial. Return 100 times retained divided by initial as a percentage. Eligibility and matched item identity are independently established.
retentionPercent=100*retainedCount/initialCount Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Percentage under the stated numerator, denominator and sign convention. | number |
{
"input": {
"actualRetainedEligibleItemCount": 2,
"actualInitiallyEligibleItemCount": 4
},
"output": {
"result": {
"value": 50
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use Useful Field of View Calculator for a complementary operation: Useful field of view depends on stimulus presentation, eccentricity and the threshold procedure used by a particular task.
Use Multiple Object Tracking Capacity Calculator for a complementary operation: A tracking-capacity criterion depends on the task and definition of successful tracking.
References
-
Retention Percentage Calculator — tool.io
Similar or alternative tools
- Useful Field of View Calculator
Useful field of view depends on stimulus presentation, eccentricity and the threshold procedure used by a particular task.
- Multiple Object Tracking Capacity Calculator
A tracking-capacity criterion depends on the task and definition of successful tracking.