Balanced Incomplete Block Designs for Inter-Rater Reliability Studies

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Abstract
Occasionally, an inter-rater reliability study must be designed so that each subject is rated by fewer than all the participating raters. If there is interest in comparing the raters' mean levels of rating, and if it is desired that each mean be estimated with the same precision, then a balanced incomplete block design for the reliability study is indicated. Methods for executing the design and for analyzing the resulting data are presented, using data from an actual study for illustration.