1
vote
0answers
3 views

Kappa (interrater agreement) alternative for count-based data which results in inflated agreement at lower counts?

I have a data set where four coders are rating 800 items on various attributes. This is achieved by reporting a count of the prevalence of each attribute, e.g. rater 1 thinks attribute A appears in ...
3
votes
2answers
467 views

Inconsistency of findings between Kappa and ICC for IRR study

I used the following R script to calculate the Kappa and ICC for a measured done by two raters on 23 subjects: ...
32
votes
1answer
2k views

Computing Cohen's Kappa variance (and standard errors)

The Kappa ($\kappa$) statistic was introduced in 1960 by Cohen [1] to measure agreement between two raters. Its variance, however, had been a source of contradictions for quite a some time. My ...
3
votes
1answer
284 views

Inter-rater reliability with many non-overlapping raters

I have a data set of 11,000+ distinct items, each of which was classified on a nominal scale by at least 3 different raters on Amazon's Mechanical Turk. 88 different raters provided judgments for ...
15
votes
2answers
10k views

Inter-rater reliability for ordinal or interval data

Which inter-rater reliability methods are most appropriate for ordinal or interval data? I believe that "Joint probability of agreement" or "Kappa" are designed for nominal data. Whilst "Pearson" and ...