Description
Return valid-look duration share.
Developmental research records may encode task eligibility, known responses, observer roles and withdrawal. A flag or support share describes supplied observations and does not independently assess a child, verify consent or establish a clinical interpretation.
Return valid-look duration share.
When to use this tool
Use Child Task Look Validity Share when checking explicit developmental-study record and observation rules.
How to use the tool and how it works
- Enter validLookDuration, recordedLookDuration. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read share, defined. Inspect defined before interpreting the associated values.
Return valid-look duration share. Require 0 <= validLookDuration <= recordedLookDuration; divide when recorded duration is positive, otherwise return zero and defined = false.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| validLookDuration | Valid Look Duration | Required. Finite number; minimum 0. |
| recordedLookDuration | Recorded Look Duration | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| share | Dimensionless ratio on the explicitly stated numerator and denominator basis. | Required. Finite number. |
| defined | Whether the stated denominator is nonzero; inspect this before using the associated ratio. | Required. Boolean. |
{
"input": {
"validLookDuration": 3,
"recordedLookDuration": 4
},
"output": {
"share": 0.75,
"defined": true
}
}Limitations and assumptions
- Zero exposure is undefined; visibility and look-validity coding are supplied rather than detected.
- 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 an approved study protocol and appropriate professional assessment for participant decisions, developmental interpretation or clinical questions.
References
Similar or alternative tools
- Child Task Valid Trial Proportion
Return task administration and validity fractions on distinct denominators.
- Child Vocabulary Checklist Unknown Denominator
Return vocabulary-checklist shares with an explicit unknown policy.