Caregiver Recall Anchor Dategap Tool

Description

Return a caregiver recall gap with supplied uncertainty.

Developmental-study observations use explicit trial, age, stimulus and missing-data conventions. Counterbalance flags and observation shares describe supplied research records; they do not establish actual stimulus presentation, an age correction appropriate for clinical use or a developmental assessment.

Return a caregiver recall gap with supplied uncertainty.

When to use this tool

Use Caregiver Recall Anchor Dategap when checking the stated child-study observation, timing or record convention.

How to use the tool and how it works

Enter reportedDay, referenceDay, uncertaintyDays. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read gapDays, lowerGap, upperGap. Use the output convention below.

Return a caregiver recall gap with supplied uncertainty. Require nonnegative whole uncertaintyDays; gapDays = reported-reference, lower/upperGap add minus/plus uncertainty.^[1]

Input field	Meaning and units	Accepted input
reportedDay	Reported Day	Required. Safe integer.
referenceDay	Reference Day	Required. Safe integer.
uncertaintyDays	Uncertainty Days	Required. Safe integer; minimum 0.

Output field	Interpretation	Returned shape
gapDays	Gap Days	Required. Safe integer.
lowerGap	Lower Gap	Required. Safe integer.
upperGap	Upper Gap	Required. Safe integer.

json

{
  "input": {
    "reportedDay": 110,
    "referenceDay": 100,
    "uncertaintyDays": 3
  },
  "output": {
    "gapDays": 10,
    "lowerGap": 7,
    "upperGap": 13
  }
}

Limitations and assumptions

This is a deterministic supplied day envelope, not a validated recall-error distribution or confidence interval.
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 study protocol, actual observations and consent/assent records; use validated assessment and qualified professional judgment for developmental or care decisions.

References

Calculation and input contract: child-development/caregiver-recall-anchor-dategap — tool.io

Similar or alternative tools

Caregiver Report Source Age
Return observation, caregiver-report and extraction delays.
Research Age Month Boundary Gap
Return age offset from a supplied month boundary.