Description
eligible = observed-excluded; engagementFraction = engaged/eligible.
Assessment coverage can refer to scored items, applicable items, observation counts or total weights. A support share depends on those choices and is separate from a final score, a validated scale or an inference about a learner.
eligible = observed-excluded; engagementFraction = engaged/eligible.
When to use this tool
Use Classroom Engagement Time Sampling Term when checking an explicit assessment or observation-support denominator.
How to use the tool and how it works
- Enter engaged, observed, excluded. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read eligible, engagementFraction. Use the output convention below.
Require whole observed >= 1, excluded between zero and observed-1 and engaged between zero and observed-excluded. eligible = observed-excluded; engagementFraction = engaged/eligible.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| engaged | Engaged | Required. Safe integer; minimum 0. |
| observed | Position-aligned flags specifying which records are observed. | Required. Safe integer; minimum 1. |
| excluded | Excluded | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| eligible | Eligible | Required. Safe integer. |
| engagementFraction | Engagement Fraction | Required. Finite number. |
{
"input": {
"engaged": 12,
"observed": 20,
"excluded": 4
},
"output": {
"eligible": 16,
"engagementFraction": 0.75
}
}Limitations and assumptions
- The fraction describes supplied time-sampling counts, not continuous engagement duration, independent observations or a validated learner assessment.
- 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 assessment design, missing-item policy and observation method before interpreting coverage as valid achievement evidence.
References
Similar or alternative tools
- Item Observation Support Share
applicableWeight sums applicable items; observedWeight additionally requires observed.
- Question Bank Exposure One Item Term
exposureFraction = seen/administrations.