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.
Description
Flanker congruency effects compare response times for differing distractor conditions.
Flanker congruency effects compare response times for differing distractor conditions. The signed mean difference describes an aggregate task contrast.1
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.
When to use Flanker Congruency Effect
Use this tool to 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.
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 Flanker Congruency Effect 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 congruencyEffectMs. 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 comparable correct-trial means in milliseconds. Return their signed difference, retaining negative effects.
congruencyEffectMs=meanIncongruentMs−meanCongruentMs Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| congruencyEffectMs | Incongruent minus congruent mean response time. (ms) | number |
{
"input": {
"meanIncongruentMs": 650,
"meanCongruentMs": 560
},
"output": {
"congruencyEffectMs": 90
}
}Limitations and assumptions
No trial cleaning, averaging, uncertainty or inference is performed. Correct-response criteria and comparable conditions must be prepared upstream.
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 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. 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
-
Flanker Congruency Effect — tool.io
Similar or alternative tools
- 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.
- 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.