Description
Return a supplied stimulus-feature contrast and reference residual.
Cognitive research records can encode stimuli, response timing, probability assumptions and observation support. Local differences and caller-defined tolerance labels do not establish perceptual validity, a cognitive mechanism, statistical equivalence or a clinical assessment.
Return a supplied stimulus-feature contrast and reference residual.
When to use this tool
Use Stimulus Feature Contrast Gap when checking a supplied cognitive-task timing, stimulus, probability or evidence convention.
How to use the tool and how it works
- Enter first, second, referenceContrast. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read contrast, residual. Use the output convention below.
Return a supplied stimulus-feature contrast and reference residual. contrast = first-second, residual = contrast-referenceContrast.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| first | First | Required. Finite number. |
| second | Second | Required. Finite number. |
| referenceContrast | Reference Contrast | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| contrast | Contrast | Required. Finite number. |
| residual | Signed difference in the direction stated above, with matching units. | Required. Finite number. |
{
"input": {
"first": 8,
"second": 3,
"referenceContrast": 4
},
"output": {
"contrast": 5,
"residual": 1
}
}Limitations and assumptions
- Features require a common scale; this arithmetic difference does not establish perceptual contrast, calibration or discriminability.
- 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 a validated study design, calibrated measurements and appropriate statistical/professional interpretation for cognitive or health conclusions.
References
Similar or alternative tools
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