Download the SAS code below written by Dr. Luqiang Wang for finding point and interval estimates of the intraclass correlation coeffiicient (ICC) in a three-way crossed design with raters, subjects, and occasions.
The zipped file contains a small example data set as well as 3 separate SAS program files for:
- Point and interval estimation of the ICC using means squares from the analysis of variance (ANOVA);
- Bootstrap confidence intervals for the ICC using the Efron percentile method and the bias-corrected method;
- Point and interval estimation of the ICC by a custom Gibbs sampler implementation of the method of Monte Carlo Markov chains.