irr (version 0.84)

kappam.light: Light's Kappa for m raters

Description

Computes Light's Kappa as an index of interrater agreement between m raters on categorical data.

Usage

kappam.light(ratings)

Arguments

ratings

n*m matrix or dataframe, n subjects m raters.

Value

A list with class '"irrlist"' containing the following components:

$method

a character string describing the method applied for the computation of interrater reliability.

$subjects

the number of subjects examined.

$raters

the number of raters.

$irr.name

a character string specifying the name of the coefficient.

$value

value of Kappa.

$stat.name

a character string specifying the name of the corresponding test statistic.

$statistic

the value of the test statistic.

$p.value

the p-value for the test.

Details

Missing data are omitted in a listwise way. Light's Kappa equals the average of all possible combinations of bivariate Kappas between raters.

References

Conger, A.J. (1980). Integration and generalisation of Kappas for multiple raters. Psychological Bulletin, 88, 322-328. Light, R.J. (1971). Measures of response agreement for qualitative data: Some generalizations and alternatives. Psychological Bulletin, 76, 365-377.

See Also

kappa2, kappam.fleiss

Examples

# NOT RUN {
data(diagnoses)
kappam.light(diagnoses)   # Light's Kappa
# }