Stroop Interference
Calculate the signed stroop interference as mean incongruent response time minus mean congruent response time in milliseconds, using caller-prepared comparable correct-trial means.
Description
Stroop interference summarizes the response-time difference between comparable incongruent and congruent conditions.
Stroop interference summarizes the response-time difference between comparable incongruent and congruent conditions. A signed subtraction preserves a reversed effect.1
Calculate the signed stroop interference as mean incongruent response time minus mean congruent response time in milliseconds, using caller-prepared comparable correct-trial means.
When to use Stroop Interference
Use this tool to calculate the signed stroop interference as mean incongruent response time minus mean congruent response time in milliseconds, using caller-prepared comparable correct-trial means.
Prepare the task-specific rates, comparable response-time means, identified spike train, processed ERP or estimated spectra requested. Confirm units, preprocessing, sample pairing and caller-fitted model coefficients.
How to use Stroop Interference and understand its results
- Prepare the task-specific rates, comparable response-time means, identified spike train, processed ERP or estimated spectra requested. Confirm units, preprocessing, sample pairing and caller-fitted model coefficients.
- Enter meanIncongruentMs, meanCongruentMs using the field table and calculation rules, then run the tool.
- Read interferenceMs. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| meanIncongruentMs | Mean correct-trial incongruent response time. (ms) | number; minimum: 0 | Required |
| meanCongruentMs | Mean correct-trial congruent response time. (ms) | number; minimum: 0 | Required |
Enter nonnegative caller-prepared correct-trial means in milliseconds. Return the signed incongruent-minus-congruent difference; equality gives zero.
interferenceMs=meanIncongruentMs−meanCongruentMs Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| interferenceMs | Incongruent minus congruent mean response time. (ms) | number |
{
"input": {
"meanIncongruentMs": 650,
"meanCongruentMs": 560
},
"output": {
"interferenceMs": 90
}
}Limitations and assumptions
No trials are filtered, means calculated or statistical test performed. Accuracy tradeoffs, outliers and task comparability require upstream analysis.
Numeric inputs must be finite. Follow the calculation-specific rules for overflow, underflow and exceptional cases. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Flanker Congruency Effect: Calculate the signed flanker congruency effect as mean incongruent response time minus mean congruent response time in milliseconds, using caller-prepared comparable correct-trial means. For a complementary task, use Hick Choice Reaction Time: Evaluate the equally likely choice form RT = a + b × log2(n), using caller-fitted coefficients in milliseconds. Predictions must be nonnegative; this is a model evaluation without participant calibration.
References
-
Stroop Interference — tool.io
Similar or alternative tools
- Flanker Congruency Effect
Calculate the signed flanker congruency effect as mean incongruent response time minus mean congruent response time in milliseconds, using caller-prepared comparable correct-trial means.
- Hick Choice Reaction Time
Evaluate the equally likely choice form RT = a + b × log2(n), using caller-fitted coefficients in milliseconds. Predictions must be nonnegative; this is a model evaluation without participant calibration.