stable
testMICOM(
.object = NULL,
.approach_p_adjust = "none",
.handle_inadmissibles = c("drop", "ignore", "replace"),
.R = 499,
.seed = NULL,
.verbose = TRUE
)An R object of class cSEMResults resulting from a call to csem().
Character string or a vector of character strings.
Approach used to adjust the p-value for multiple testing.
See the methods argument of stats::p.adjust() for a list of choices and
their description. Defaults to "none".
Character string. How should inadmissible results
be treated? One of "drop", "ignore", or "replace". If "drop", all
replications/resamples yielding an inadmissible result will be dropped
(i.e. the number of results returned will potentially be less than .R).
For "ignore" all results are returned even if all or some of the replications
yielded inadmissible results (i.e. number of results returned is equal to .R).
For "replace" resampling continues until there are exactly .R admissible solutions.
Depending on the frequency of inadmissible solutions this may significantly increase
computing time. Defaults to "drop".
Integer. The number of bootstrap replications. Defaults to 499.
Integer or NULL. The random seed to use. Defaults to NULL in which
case an arbitrary seed is chosen. Note that the scope of the seed is limited
to the body of the function it is used in. Hence, the global seed will
not be altered!
Logical. Should information (e.g., progress bar) be printed
to the console? Defaults to TRUE.
A named list of class cSEMTestMICOM containing the following list element:
$Step2A list containing the results of the test for compositional invariance (Step 2).
$Step3A list containing the results of the test for mean and variance equality (Step 3).
$InformationA list of additional information on the test.
The functions performs the permutation-based test for measurement invariance
of composites across groups proposed by Henseler2016;textualcSEM.
According to the authors assessing measurement invariance in composite
models can be assessed by a three-step procedure. The first two steps
involve an assessment of configural and compositional invariance.
The third steps involves mean and variance comparisons across groups.
Assessment of configural invariance is qualitative in nature and hence
not assessed by the testMICOM() function.
As testMICOM() requires at least two groups, .object must be of
class cSEMResults_multi. As of version 0.2.0 of the package, testMICOM()
does not support models containing second-order constructs.
It is possible to compare more than two groups, however, multiple-testing
issues arise in this case. To adjust p-values in this case several p-value
adjustments are available via the approach_p_adjust argument.
The remaining arguments set the number of permutation runs to conduct
(.R), the random number seed (.seed),
instructions how inadmissible results are to be handled (handle_inadmissibles),
and whether the function should be verbose in a sense that progress is printed
to the console.
The number of permutation runs defaults to args_default()$.R for
performance reasons. According to Henseler2016;textualcSEM
the number of permutations should be at least 5000 for assessment to be
sufficiently reliable.
if (FALSE) { # \dontrun{
# NOTE: to run the example. Download and load the newst version of cSEM.DGP
# from GitHub using devtools::install_github("M-E-Rademaker/cSEM.DGP").
# Create two data generating processes (DGPs) that only differ in how the composite
# X is build. Hence, the two groups are not compositionally invariant.
dgp1 <- "
# Structural model
Y ~ 0.6*X
# Measurement model
Y =~ 1*y1
X <~ 0.4*x1 + 0.8*x2
x1 ~~ 0.3125*x2
"
dgp2 <- "
# Structural model
Y ~ 0.6*X
# Measurement model
Y =~ 1*y1
X <~ 0.8*x1 + 0.4*x2
x1 ~~ 0.3125*x2
"
g1 <- generateData(dgp1, .N = 399, .empirical = TRUE) # requires cSEM.DGP
g2 <- generateData(dgp2, .N = 200, .empirical = TRUE) # requires cSEM.DGP
# Model is the same for both DGPs
model <- "
# Structural model
Y ~ X
# Measurement model
Y =~ y1
X <~ x1 + x2
"
# Estimate
csem_results <- csem(.data = list("group1" = g1, "group2" = g2), model)
# Test
testMICOM(csem_results, .R = 50, .alpha = c(0.01, 0.05), .seed = 1987)
} # }