Description
Divide observed by visit duration and return the unobserved remainder.
A diary share compares recorded time with a chosen observation period. The interpretation depends on the activity definition, overlapping entries, and the denominator; arithmetic alone does not verify the completeness of the diary.
Divide observed by visit duration and return the unobserved remainder.
When to use this tool
Use Ethnographic Visit Observed Minute Fraction when you need a stated time-use share from supplied diary totals.
How to use the tool and how it works
- Enter observedMinutes, visitMinutes. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read observedFraction, unobservedMinutes. Use the output convention below.
Require observedMinutes within positive visitMinutes. Divide observed by visit duration and return the unobserved remainder.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| observedMinutes | Observed Minutes | Required. Finite number; minimum 0. |
| visitMinutes | Visit Minutes | Required. Finite number; strictly above 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| observedFraction | Observed Fraction | Required. Finite number. |
| unobservedMinutes | Unobserved Minutes | Required. Finite number. |
{
"input": {
"observedMinutes": 45,
"visitMinutes": 60
},
"output": {
"observedFraction": 0.75,
"unobservedMinutes": 15
}
}Limitations and assumptions
- This is a supplied time-coverage measure, not representative sampling, observer agreement, consent, or ethnographic interpretation.
- 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
Review the full diary coding scheme and observation coverage before interpreting the share.
References
Similar or alternative tools
- Care Diary Activity Minute Count
Return elapsed duration and divide it equally across the supplied activity count.
- Screen Time Character Fraction
Require characterSeconds between zero and positive analyzedSeconds and divide for fraction.