mu4: Obtain Ten Berge and Socan's (2004) mu4

In eunscho/unirel: Compute and Compare Unidimensional Reliability Coefficients

Description

Obtain Ten Berge and Socan's (2004) mu4.

Usage

mu4(data)

Arguments

data	a dataframe or a matrix (unidimensional)

Details

The original formula and the formula of psych's tenberge() are different. There is a high possibility that the original formula is incorrect and psych's version is correct. According to Equation (4) of the original article, mu should increase monotonically (e.g., mu4>=mu3), but if the original formula is followed, it may decrease in some cases. The formula of the original paper is 2h, but changing it to 2^h solves this problem. This function follow the latter interpretation.

Author(s)

Eunseong Cho, [e-mail]

References

Ten Berge, J. M. F., & Zegers, F. E. (1978). A series of lower bounds to the reliability of a test. Psychometrika, 43(4), 575-579.

Examples

mu4(Graham1)

eunscho/unirel documentation built on Dec. 20, 2021, 6:44 a.m.