Content area
Abstract
Mean and covariance structure modeling procedures have been widely used for assessing factorial invariance and the practice of partial factorial invariance (PFI) is common. This study investigates the extent to which PFI affects subsequent tests of intercept invariance and latent mean differences. The study implements a Monte Carlo experiment where factors of model size, severity of PFI, construct reliability, and intercept and latent mean difference pattern are manipulated. Results show that when partial loading invariance exists but is correctly specified, it did not negatively affect the power of the omnibus test of intercept invariance. However, results also suggest that relying on modification indices to determine noninvariant intercepts would be problematic—these indices are likely to lead to incorrect identifications of noninvariant parameters. With respect to latent mean comparisons, various forms of partial factorial invariance, when correctly specified, did not impact the test of latent mean differences. With the proliferation of educational research involving cross-group comparisons, researchers need to understand how PFI may affect analyses upon which substantive inferences are based. Findings from this study will provide a starting point for answering this very important question.
