Biology, images, analysis, design...
Use/Abuse Principles How To Related
"It has long been an axiom of mine that the little things are infinitely the most important" (Sherlock Holmes)

Search this site




Standard Error of Kappa

The standard error(s) of the Kappa coefficient were obtained by Fleiss (1969). Different standard errors are required depending on whether the null hypothesis is that κ = 0, or is equal to some specified value.

We give below the appropriate standard error of the Kappa coefficient for testing whether Kappa = 0:

Algebraically speaking -

SE (0) (κ)    =    
1 [pe2 + pe − ΣRiCi(Ri + Ci)/N3]
(1 − pe)2N
  • pe is the expected proportion that agree,
  • Ri and Ci are the row and column totals for the contingency table,
  • N is the number of observations.

Standard errors for where the null is not equal to zero, and for the weighted kappa coefficient can be found in Fleiss (1981)