Reviewer calibration · Work Package D

Reviewer calibration

The GII-US reviewer-calibration harness: inter-rater reliability computed with named statistics — Krippendorff's α, weighted κ, and ICC(2,k) — and each scorecard component graded against the provisional pilot and production thresholds.

5Components
3/5At production
1/5At pilot
two floorsThresholdsA pilot-learning floor and a higher production floor for reviewer agreement. Each statistic is graded against both; the values are internal.

Composite scoring involves judgment — severity anchors, persistence, reach, orientation. GII manages it partly through blinded reviewer scoring and inter-rater analysis: reviewer agreement is measured with named statistics, not an undefined standard. Components that do not yet agree are flagged for anchor revision — no target score distribution is imposed. The pilot advances beyond beta only when agreement is acceptable (one of the pilot success criteria).

Computed live by @gii/calibration on an illustrative blinded rating set. GII-US is pre-pilot; these are not ratings of any real decision.

agreement

Agreement by scorecard component

Values are on the statistic's own 0–1 scale, so a bar's length is directly comparable across statistics. Each is graded against a pilot-learning floor and a higher production floor.

Magnitude — severity (E)0.9823
Magnitude — reach (R)0.775
Confidence — identification (I)0.4518
Evidence level (A–F ladder)0.8654
Composite magnitude (GII-M)0.9882

4.0626999999999995 components in total · Component detail

The named statistics#

StatisticApplies to
Krippendorff's α (interval)E, R, P, S magnitude components and I, Q, F, B, T confidence components
Weighted κ / ordinal αevidence-level and maturity assignment
ICC(2,k)composite magnitude

Calibration results#

Each component’s agreement, graded against the provisional thresholds a pilot-learning floor and a higher production floor:

ComponentStatisticAgreementLevel
Magnitude — severity (E)krippendorff-interval0.9823production
Magnitude — reach (R)krippendorff-interval0.775pilot
Confidence — identification (I)krippendorff-interval0.4518below pilot
Evidence level (A–F ladder)weighted-kappa0.8654production
Composite magnitude (GII-M)icc-2k0.9882production
Summary. 3 production · 1 pilot · 1 below-pilot. Needs recalibration: conf-identification. A below-pilot component is a signal to revise the scoring anchors and re-score, not a failure of the case.

The estimators are standard (Krippendorff’s α, Cohen’s weighted κ, ICC(2,k)) and tested against documented reference datasets; the thresholds are provisional, calibrated in the pilot. Compute on your own ratings via POST /api/v1/calibration or gii calibrate <ratings.json>.