Description
Return delayed/immediate retention and each accuracy fraction.
Developmental research scores can be expressed as changes, ratios, reversed scales or contrasts between conditions. Those arithmetic forms have distinct denominators and need a suitable measurement model before they support psychological interpretation.
Return delayed/immediate retention and each accuracy fraction.
When to use this tool
Use Child Memory Delay Retention Fraction when checking a supplied score or response contrast.
How to use the tool and how it works
- Enter immediateCorrect, delayedCorrect, possible. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read retentionFraction, immediateFraction, delayedFraction. Use the output convention below.
Return delayed/immediate retention and each accuracy fraction. Require positive whole possible, immediateCorrect in [1,possible] and delayedCorrect in [0,possible]; retentionFraction = delayed/immediate.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| immediateCorrect | Immediate Correct | Required. Safe integer; minimum 1. |
| delayedCorrect | Delayed Correct | Required. Safe integer; minimum 0. |
| possible | Possible | Required. Safe integer; minimum 1. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| retentionFraction | Retention Fraction | Required. Finite number. |
| immediateFraction | Immediate Fraction | Required. Finite number. |
| delayedFraction | Delayed Fraction | Required. Finite number. |
{
"input": {
"immediateCorrect": 8,
"delayedCorrect": 6,
"possible": 10
},
"output": {
"retentionFraction": 0.75,
"immediateFraction": 0.8,
"delayedFraction": 0.6
}
}Limitations and assumptions
- Retention can exceed one; these counts do not establish an individual memory ability or developmental condition.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use validated instruments, an appropriate study design and professional assessment when interpreting individual development or cognitive function.
References
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