Useful Functions for Ridit Analysis
Compute mean ridit of group given reference group
Compute mean ridits of multiple groups
Utility to determine reference group. Primarily for internal use/
tools:::Rd_package_title("ridittools")
Compute standard error of mean ridit for group given reference group
Compute standard error of difference between two mean ridits
Compute standard errors of mean ridits of multiple groups
Compute ridit scores for group
Functions to compute ridit scores of vectors, compute mean ridits and their standard errors for vectors compared to a reference vector, as described in Fleiss (1981, ISBN:0-471-06428-9), and compute means/SEs for multiple groups in matrices. Data can be either counts or proportions. Emphasis is on ridit analysis of ordered categorical data such as Likert items and pain-rating scales.