The data consist of ratings, on a 4-point scale, made by five anaesthetists of patients' pre-operative health. The ratings were based on the anaesthetists assessments of a standard form completed for all of the patients. There are 45 patients (items) and five anaesthetists (raters) in total. The first anaesthetist assessed the forms a total of three times, spaced several weeks apart. The other anaesthetists each assessed the forms once. The data is in 'long' format.
anesthesiaA data.frame with 315 rows and 3 columns:
The item index - which item is being rated
The rater index - which rater is doing the rating
The rating given
Dawid, A. P., and A. M. Skene. "Maximum Likelihood Estimation of Observer Error-Rates Using the EM Algorithm." Applied Statistics 28, no. 1 (1979): 20.