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Landis, JR and Kock GC (1977) The measurement of observer agreement for categorical data. ''Biometrics'', '''33''', 159-174. Landis, JR and Koch, GC (1977) The measurement of observer agreement for categorical data. ''Biometrics'', '''33''', 159-174.

Benchmarks for kappa (Landis & Koch, 1977)

Kappa

Strength of Association

0.00

Poor

0.01-0.20

Slight

0.21-0.40

Fair

0.41-0.60

Moderate

0.61-0.80

Substantial

0.81-1.00

Almost Perfect

Reference

Landis, JR and Koch, GC (1977) The measurement of observer agreement for categorical data. Biometrics, 33, 159-174.

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