get_fs_int: Compute interaction indicators for tspa() function

In Gengrui-Zhang/R2spa: An R package for two-stage path analysis (2S-PA) to adjust for measurement errors

Compute interaction indicators for tspa() function

Description

This function computes product indicators and the corresponding standard errors according to equation (3) in Hsiao et al. (2021). The double-mean-centering (DMC) strategy is applied in this function, where first-order indicators are mean-centered first and product indicators for latent interaction term(s) are mean-centered again (Lin et al., 2010)

Usage

get_fs_int(
  dat,
  fs_name,
  se_fs,
  loading_fs,
  lat_var = rep_len(1, length.out = length(fs_name)),
  model = NULL
)

Arguments

dat	A data frame containing first-order factor score indiactors with standard error.
fs_name	A vector indicating names of factor scores
se_fs	A vector indicating standard error of factor scores
loading_fs	A vector indicating model-implied loadings of factor scores
lat_var	A vector indicating latent variances
model	An optional string specifying the measurement model in lavaan syntax.

Value

A data frame of product indicators for interaction terms, with their loadings and standard errors.

References

Hsiao, Y.-Y., Kwok, O.-M., & Lai, M. H. C. (2021). Modeling measurement errors of the exogenous composites from congeneric measures in interaction models. Structural Equation Modeling: A Multidisciplinary Journal, 28(2), 250–260. https://doi.org/10.1080/10705511.2020.1782206

Examples

library(lavaan)
fs1 <- get_fs(HolzingerSwineford1939,
              model = "visual  =~ x1 + x2 + x3",
              std.lv = TRUE)
fs2 <- get_fs(HolzingerSwineford1939,
              model = "textual =~ x4 + x5 + x6",
              std.lv = TRUE)
fs_dat <- cbind(fs1, fs2)
fs_dat2 <- get_fs_int(fs_dat,
  fs_name = c("fs_visual", "fs_textual"),
  se_fs = c("fs_visual_se", "fs_textual_se"),
  loading_fs = c("visual_by_fs_visual",
                 "textual_by_fs_textual")
)
head(fs_dat2[c("fs_visual", "fs_textual", "fs_visual:fs_textual",
               "fs_visual:fs_textual_se", "fs_visual:fs_textual_ld")])

Gengrui-Zhang/R2spa documentation built on Sept. 6, 2024, 5:01 p.m.