Description
Return overlap of a recall interval with an observation window.
Consumer-study records can describe exposure, recall, option availability and purchase-value bases. Local record arithmetic preserves a supplied study or billing convention without measuring preferences, establishing memory accuracy or determining consumer rights.
Return overlap of a recall interval with an observation window.
When to use this tool
Use Purchase Recall Window Exposure when checking a supplied consumer-record, recall-window, choice or basket convention.
How to use the tool and how it works
- Enter windowStart, windowEnd, recallStart, recallEnd. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read overlapDuration, windowShare. Use the output convention below.
Return overlap of a recall interval with an observation window. Require windowStart < windowEnd and recallStart <= recallEnd; overlap uses max(0,min(ends)-max(starts)), windowShare divides by window length.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| windowStart | Window Start | Required. Finite number. |
| windowEnd | Window End | Required. Finite number. |
| recallStart | Recall Start | Required. Finite number. |
| recallEnd | Recall End | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| overlapDuration | Overlap Duration | Required. Finite number. |
| windowShare | Window Share | Required. Finite number. |
{
"input": {
"windowStart": 0,
"windowEnd": 100,
"recallStart": 20,
"recallEnd": 80
},
"output": {
"overlapDuration": 60,
"windowShare": 0.6
}
}Limitations and assumptions
- Touching intervals have zero overlap; supplied times are not independently verified and recall quality is not measured.
- 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 actual study data, validated measurement methods and applicable merchant/consumer rules for substantive behavioral or transaction conclusions.
References
Similar or alternative tools
- Recall Window Age Offset
Compare event age with a supplied recall window.
- Purchase Recall Source Gap
Compare recall timing with source-record creation.