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ietf-draft-analyzer/data/reports/survey-kappa.md

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Inter-rater reliability — IETF landscape survey

Corpus: clean IETF (n≈524). Sonnet=524, Haiku=523, prod labels=524.

κ interpretation (Landis & Koch): <0.2 slight, 0.20.4 fair, 0.40.6 moderate, 0.60.8 substantial, >0.8 almost perfect.

Sonnet (re-rate) vs Haiku (re-rate) — controlled inter-coder (n shared = 523)

Primary category (Cohen's κ): κ = 0.652 (substantial), raw agreement 70.8%, n = 517

Most-confused category pairs:

A B count
A2A protocols Autonomous netops 17
A2A protocols Agent discovery/reg 16
A2A protocols Agent identity/auth 15
Agent identity/auth Other AI/agent 14
Data formats/interop Other AI/agent 10
A2A protocols Data formats/interop 9
Agent identity/auth Data formats/interop 8
Autonomous netops Other AI/agent 6

Ordinal dimensions (quadratic-weighted κ):

dimension κ_w raw agree n
novelty 0.206 (fair) 39.4% 523
maturity 0.592 (moderate) 54.1% 523
overlap 0.127 (slight) 26.4% 523
momentum 0.457 (moderate) 33.8% 467
relevance 0.728 (substantial) 37.7% 523

Sonnet (re-rate) vs Production labels — drift/stability (n shared = 524)

Primary category (Cohen's κ): κ = 0.645 (substantial), raw agreement 69.9%, n = 518

Most-confused category pairs:

A B count
Agent identity/auth Other AI/agent 18
A2A protocols Autonomous netops 15
A2A protocols Agent identity/auth 13
Data formats/interop Other AI/agent 11
A2A protocols Data formats/interop 8
A2A protocols Agent discovery/reg 8
Autonomous netops Other AI/agent 7
Agent identity/auth Data formats/interop 7

Ordinal dimensions (quadratic-weighted κ):

dimension κ_w raw agree n
novelty 0.477 (moderate) 43.1% 524
maturity 0.620 (substantial) 52.1% 524
overlap 0.282 (fair) 41.8% 524
momentum 0.247 (fair) 32.4% 524
relevance 0.234 (fair) 43.7% 524

Haiku (re-rate) vs Production labels (n shared = 523)

Primary category (Cohen's κ): κ = 0.596 (moderate), raw agreement 65.9%, n = 522

Most-confused category pairs:

A B count
A2A protocols Agent discovery/reg 17
A2A protocols Autonomous netops 16
Agent identity/auth Data formats/interop 16
A2A protocols Agent identity/auth 14
Autonomous netops Other AI/agent 10
Agent identity/auth Other AI/agent 9
AI safety/alignment Agent identity/auth 9
A2A protocols Data formats/interop 8

Ordinal dimensions (quadratic-weighted κ):

dimension κ_w raw agree n
novelty 0.097 (slight) 13.2% 523
maturity 0.412 (moderate) 37.3% 523
overlap 0.087 (slight) 21.2% 523
momentum 0.114 (slight) 10.1% 467
relevance 0.220 (fair) 34.8% 523