unirel: Obtain various unidimensional reliablity coefficients

In eunscho/unirel: Compute and Compare Unidimensional Reliability Coefficients

Description

R packages that provide unidimensional reliability coefficients include Lambda4 and psych. These are usually separate functions, so comparing multiple reliability estimates can take a long time. This function shows the reliability coefficients newly added in this package together with the reliability coefficients provided by Lambda4 and psych. This function can provide Table 2 of Cho(in press) immediately.

Usage

unirel(data, Lambda4.include = TRUE, psych.include = TRUE)

Arguments

data	a dataframe or a matrix (unidimensional)
Lambda4.include	Whether to include the reliability coefficients provided by the package Lambda4 (lambda5, lambda6, max_lambda, lambda4_max, lambda4_75)
psych.include	Whether to include reliability coefficients (GLB.algebraic, GLB.fa) provided by the package psych

Value

alpha coefficient alpha (tau-equivalent reliability)

std_alpha standardized alpha

lambda2 Guttman's lambda2

mu2 Ten Berge and Zegers' mu2

mu3 Ten Berge and Zegers' mu3

mu4 Ten Berge and Zegers' mu4

feldt Feldt's classical congeneric reliability coefficient

gilmer the Gilmer-Fedlt coefficient

joreskog unidimensional CFA (congeneric) reliability

hancock Hancock's H

heise Heise-Borhnstedt's Omega

kaisercaffrey Kaiser-Caffrey's alpha

lambda5 Guttman's lambda5

lambda5 Guttman's lambda6

max_lambda the maximum among lambda2, lambda5, and lambda6

lambda4_max the maximum among all possible lambda4

lambda4_75 the 75the percentile among all possible lambda4

glb.fa the greatest lower bounds by Ten Berge & Kiers (1991) method

glb.algebraic the greatest lower bounds by Moltner & Revelle (2015) method

omega_Lambda4 omega total (factors = 1) provided by the package Lambda4

omega_psych omega total (nfactors = 1) provided by the package psych

Author(s)

Eunseong Cho, [e-mail]

References

Cho, E. (in press). Neither Cronbach's alpha nor McDonald's omega: A comment on Sijtsma and Pfadt. Psychometrika.

See Also

[Lambda4::lambda5()] for a related function of the package Lambda4

[Lambda4::lambda6()] for a related function of the package Lambda4

[Lambda4::quant.lambda4()] for a related function of the package Lambda4

[psych::GLB.algebraic()] for a related function of the package psych

[psych::GLB.fa()] for a related function of the package psych

Examples

unirel(Graham1)

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