Trail Making B-A Difference Calculator
Actual TrailMakingBminusAelapsedtime, not performance diagnosis; signed result retained, actual matching units and definitions independently established.
Description
Trail Making B-minus-A subtracts two eligible elapsed times.
Trail Making B-minus-A subtracts two eligible elapsed times.1
The signed difference retains the direction of the observed contrast. The calculation and input requirements are explained below.
When to use Trail Making B-A Difference Calculator
Enter nonnegative eligible Trail B and Trail A times in seconds.
How to use Trail Making B-A Difference Calculator and how it works
- Prepare the measurements or independently established model inputs described below, with matching units and observation scope.
- Enter the required fields and run Trail Making B-A Difference Calculator.
- Read the result fields using the formula, output units, signs and ordering explained below.
- Correct any rejected inputs and rerun; interpret the result within the stated model and its assumptions.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualEligibleTrailBSeconds | Actual Eligible Trail B Seconds. Use the units and matching context stated in the calculation below. | number | Required; nonnegative; finite; other constraints below |
| actualEligibleTrailASeconds | Actual Eligible Trail A Seconds. Use the units and matching context stated in the calculation below. | number | Required; nonnegative; finite; other constraints below |
Enter nonnegative eligible Trail B and Trail A times in seconds. Subtract A from B and retain a negative difference if supplied. No norm, clinical band or time-quality assessment is applied.
differenceSeconds=trailBSeconds-trailASeconds Apply the input ordering, units and branch conditions stated above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Object containing the calculated or selected fields below. | object |
| result.value | Numeric result under the formula and output units explained above. | number |
{
"input": {
"actualEligibleTrailBSeconds": 5,
"actualEligibleTrailASeconds": 3
},
"output": {
"result": {
"value": 2
}
}
}Limitations and assumptions
The calculation uses the supplied observations and model inputs. It does not collect measurements, select a reference population or coefficient, or establish that the model applies to the actual case. The stated branch conditions and output units remain part of the result.
All fields require explicit values. Unexpected fields, wrong types, nonfinite numbers and sparse arrays are rejected. Alignment, bounds and supported-token rules are explained above; extremely large inputs or nonfinite results can also fail. Input errors differ from successful false comparisons, unavailable-domain flags and empty match lists.
Alternative or Complementary methods
Use WCST Categories Completed Counter for a complementary operation: Completed WCST categories are counts of independently qualified category completions.
Use Verbal Fluency Switching Index Calculator for a complementary operation: Verbal-fluency switching describes transitions between assigned response clusters.
References
-
Trail Making B-A Difference Calculator — tool.io
Similar or alternative tools
- WCST Categories Completed Counter
Completed WCST categories are counts of independently qualified category completions.
- Verbal Fluency Switching Index Calculator
Verbal-fluency switching describes transitions between assigned response clusters.