There are 3 subjective methods to measure the severity of a condition. Each method measures it on an ordinal scale, but the scales are different:
method 1 scale is 1-3
method 2 scale is 1-4
method 3 scale is 1-5
Evaluation of a condition according to each method is performed by 3 raters.
Krippendorff's alpha seems like an optimal approach to calculate the agreement between those 3 rates.
How could I compare the 3 resulting Krippendorff's alphas for each method and estimate if one method gives significantly better agreement than the other 2?