Description
Measure a signed change in supplied assistive-switch activation counts.
Accessibility records distinguish requested support, recorded barriers, display choices and measured local geometry. Six-dot permutations depend on array orientation, angular text size depends on viewing geometry, and playback speed changes nominal runtime. These operations do not establish accessible communication, consent, legibility or compliance for an individual or environment.
Measure a signed change in supplied assistive-switch activation counts.
When to use this tool
Use Assistive Switch Activation Count Delta when you already have previousActivations, currentActivations and need to measure a signed change in supplied assistive-switch activation counts.
How to use the tool and how it works
- Enter previousActivations, currentActivations. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedIncrement. Use the output convention below.
Require previous/current counts nonnegative safe integers; return current-previous.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| previousActivations | Previous Activations | Required. Safe integer; minimum 0. |
| currentActivations | Current Activations | Required. Safe integer; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedIncrement | Signed Increment | Required. Safe integer. |
{
"input": {
"previousActivations": 100,
"currentActivations": 125
},
"output": {
"signedIncrement": 25
}
}Limitations and assumptions
- A decrease is retained rather than assuming a reset or correction. No activations, device function, user intent or access needs are assessed.
- 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 person's recorded preferences and actual resource or route with the complete accessibility requirements. Test the relevant output and physical arrangement directly; a display token, scalar clearance or nominal playback ratio does not verify suitability or access.
References
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