Observer Agreement Window Share Tool

Description

Return duration-weighted agreement on valid intervals.

Behavioral-study coding depends on observation intervals, missing samples, event records and assignment rules. Partial-, whole- and momentary-sampling summaries answer different questions; local agreement or coverage does not establish actual behavior, a diagnosis or an effective intervention.

Return duration-weighted agreement on valid intervals.

When to use this tool

Use Observer Agreement Window Share when checking the stated behavioral-research observation, assignment, coverage or coding convention.

How to use the tool and how it works

Enter durations, firstLabels, secondLabels, valid. Follow any array-alignment requirements below. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read validDuration, agreementDuration, agreementShare, defined. Inspect defined before interpreting the associated values.

Return duration-weighted agreement on valid intervals. Require aligned arrays and nonnegative durations; agreementDuration sums valid rows with equal labels, agreementShare divides by validDuration or is undefined at zero.^[1]

Input field	Meaning and units	Accepted input
durations	Durations	Required. Array of finite number; minimum 0; maximum items 256.
firstLabels	First Labels	Required. Array of text; maximum UTF-16 length 8192; maximum items 256.
secondLabels	Second Labels	Required. Array of text; maximum UTF-16 length 8192; maximum items 256.
valid	Whether this local input/result condition holds; inspect the limitations before treating it as full validation.	Required. Array of boolean; maximum items 256.

Output field	Interpretation	Returned shape
validDuration	Valid Duration	Required. Finite number.
agreementDuration	Agreement Duration	Required. Finite number.
agreementShare	Duration-weighted literal agreement on valid rows, without chance correction.	Required. Finite number.
defined	Whether the stated denominator or information basis supports this value; inspect placeholders before interpretation.	Required. Boolean.

json

{
  "input": {
    "durations": [
      2,
      3,
      5
    ],
    "firstLabels": [
      "A",
      "B",
      "A"
    ],
    "secondLabels": [
      "A",
      "A",
      "A"
    ],
    "valid": [
      true,
      true,
      false
    ]
  },
  "output": {
    "validDuration": 5,
    "agreementDuration": 2,
    "agreementShare": 0.4,
    "defined": true
  }
}

Limitations and assumptions

This is literal agreement without chance correction; repeated/overlapping intervals and label meaning must be handled by the study protocol.
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 verified observations and the study’s complete sampling/coding protocol, with appropriate statistical and professional interpretation for health or intervention decisions.

References

Calculation and input contract: behavioral-science/observer-agreement-window-share — tool.io

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