EGAnet (version 1.2.3)

residualEGA: Residualized EGA

Description

residualEGA Estimates the number of dimensions after controlling for wording effects. EGA is applied in the residual of a random intercept item factor model (RIIFA) with one method factor and one substantive factor.

Usage

residualEGA(data, manifests, lat, negative.items)

Value

Returns a list containing:

openMx.model

OpenMX model

openMx.result

OpenMX results

openMx.std.par

OpenMX standardized parameters

ResidualMatrix

Residual matrix

EGA.Residuals

Results of the residualized EGA

Fit

Fit metrics of the network structure, calculated using the ggmfit function of the qgraph package

WordLoads

Loadings of the wording effects

Arguments

data

Matrix or data frame. Includes the variables to be used in the residualEGA analysis

manifests

Character vector. Vector indicating the names of the variables (items) to be used in the analysis.

lat

Numeric integer. Number of latent factors to be estimated. Only one substantive latent factor is recommended in the current version of the function.

negative.items

Numeric vector A numeric vector indicating the column of the negative items.

Author

Hudson F. Golino <hfg9s at virginia.edu> and Robert Moulder <[e-mail]>

See Also

EGA to estimate the number of dimensions of an instrument using EGA and CFA to verify the fit of the structure suggested by EGA using confirmatory factor analysis.

Examples

# Load data
data <- optimism

if (FALSE) {
# Residual EGA example
opt.res <- residualEGA(data = data, manifests = colnames(optimism),
lat = 1, negative.items = c(3,7,9))

# Fit:
opt.res$Fit}