Alignment Invariance Workflow

Alignment optimization can be run from item-level data or from loading and intercept matrices. Matrix input is useful for compact reproducible examples.

library(PsychoMatic)

lambda <- matrix(
  c(0.70, 0.80, 0.75,
    0.72, 0.78, 0.74),
  nrow = 2,
  byrow = TRUE
)
nu <- matrix(
  c(0.00, 0.00, 0.00,
    0.10, 0.05, 0.08),
  nrow = 2,
  byrow = TRUE
)

alignment <- inv_align_auto(lambda = lambda, nu = nu, language = "eng")
summary(alignment)

When item-level data are available, use data and group instead of lambda and nu.