ci.kappa: Confidence interval for a kappa reliability

In statpsych: Statistical Methods for Psychologists

Confidence interval for a kappa reliability

Description

Computes a confidence interval for the intraclass kappa coefficient and Cohen's kappa coefficient for two dichotomous ratings. Both measures are intraclass reliability coefficients.

Usage

ci.kappa(alpha, f00, f01, f10, f11)

Arguments

alpha	alpha level for 1-alpha confidence
f00	number of objects rated y = 0 and x = 0
f01	number of objects rated y = 0 and x = 1
f10	number of objects rated y = 1 and x = 0
f11	number of objects rated y = 1 and x = 1

Value

Returns a 2-row matrix. The results in row 1 are for the intraclass kappa. The results in row 2 are for Cohen's kappa. The columns are:

• Estimate - estimate of interrater reliability

• SE - standard error

• LL - lower limit of the confidence interval

• UL - upper limit of the confidence interval

References

\insertRef

Fleiss2003statpsych

Examples

ci.kappa(.05, 31, 12, 4, 58)

# Should return:
#               Estimate         SE        LL        UL
# IC kappa:    0.6736597 0.07479965 0.5270551 0.8202643
# Cohen kappa: 0.6756757 0.07344761 0.5317210 0.8196303

statpsych documentation built on July 9, 2023, 6:50 p.m.