net.loads: Network Loadings

In EGAnet: Exploratory Graph Analysis – a Framework for Estimating the Number of Dimensions in Multivariate Data using Network Psychometrics

Network Loadings

Description

Computes the between- and within-community strength of each variable for each community

Usage

net.loads(
  A,
  wc,
  loading.method = c("original", "revised"),
  scaling = 2,
  rotation = NULL,
  ...
)

Arguments

A	Network matrix, data frame, or EGA object
wc	Numeric or character vector (length = ncol(A)). A vector of community assignments. If input into A is an EGA object, then wc is automatically detected
loading.method	Character (length = 1). Sets network loading calculation based on implementation described in "original" (Christensen & Golino, 2021) or the "revised" (Christensen et al., 2024) implementation. Defaults to "revised"
scaling	Numeric (length = 1). Scaling factor for the magnitude of the "experimental" network loadings. Defaults to 2. 10 makes loadings roughly the size of factor loadings when correlations between factors are orthogonal
rotation	Character. A rotation to use to obtain a simpler structure. For a list of rotations, see rotations for options. Defaults to NULL or no rotation. By setting a rotation, scores estimation will be based on the rotated loadings rather than unrotated loadings
...	Additional arguments to pass on to rotations

Details

Simulation studies have demonstrated that a node's strength centrality is roughly equivalent to factor loadings (Christensen & Golino, 2021; Hallquist, Wright, & Molenaar, 2019). Hallquist and colleagues (2019) found that node strength represented a combination of dominant and cross-factor loadings. This function computes each node's strength within each specified dimension, providing a rough equivalent to factor loadings (including cross-loadings; Christensen & Golino, 2021).

Value

Returns a list containing:

unstd	A matrix of the unstandardized within- and between-community strength values for each node
std	A matrix of the standardized within- and between-community strength values for each node
rotated	NULL if rotation = NULL; otherwise, a list containing the rotated standardized network loadings (loadings) and correlations between dimensions (Phi) from the rotation

Author(s)

Alexander P. Christensen <[e-mail]> and Hudson Golino <hfg9s at virginia.edu>

References

Original implementation and simulation
Christensen, A. P., & Golino, H. (2021). On the equivalency of factor and network loadings. Behavior Research Methods, 53, 1563-1580.

Demonstration of node strength similarity to CFA loadings
Hallquist, M., Wright, A. C. G., & Molenaar, P. C. M. (2019). Problems with centrality measures in psychopathology symptom networks: Why network psychometrics cannot escape psychometric theory. Multivariate Behavioral Research, 1-25.

Revised network loadings
Christensen, A. P., Golino, H., Abad, F. J., & Garrido, L. E. (2024). Revised network loadings. PsyArXiv.

Examples

# Load data
wmt <- wmt2[,7:24]

# Estimate EGA
ega.wmt <- EGA(
  data = wmt,
  plot.EGA = FALSE # No plot for CRAN checks
)

# Network loadings
net.loads(ega.wmt)

EGAnet documentation built on Sept. 28, 2024, 9:06 a.m.