ci.ICC2a.nointer {irrICC} | R Documentation |
Confidence Interval of ICCa(2,1) under Model 2 without subject-rater interaction.
Description
This function computes the confidence interval associated with the Intraclass Correlation Coefficient (ICC) formulated as a measure of Intra-Rater Reliability under the random factorial ANOVA model (Model 2) without subject-rater interaction. This function produces the lower and upper confidence bounds.
Usage
ci.ICC2a.nointer(dfra, conflev = 0.95)
Arguments
dfra |
This is a data frame containing 3 columns or more. The first column contains subject numbers (there could be duplicates if a subject was assigned multiple ratings) and each of the remaining columns is associated with a particular rater and contains its numeric ratings. |
conflev |
This is the optional confidence level associated with the confidence interval. If not specified, the default value will be 0.95, which is the most commonly-used valuee in the literature. |
Value
This function returns a vector containing the lower confidence (lcb) and the upper confidence bound (ucb).
References
Gwet, K.L. (2014): Handbook of Inter-Rater Reliability - 4th ed. chapter 9, section 9.5.1, equations 9.5.11 and 9.5.12,page 259. Advanced Analytics, LLC.
Examples
#iccdata1 is a small dataset that comes with the package. Use it as follows:
library(irrICC)
iccdata1 #see what the iccdata1 dataset looks like
ci.ICC2a.nointer(iccdata1)