An illustration of Bayesian approximate measurement invariance with longitudinal data and a small sample size

This article illustrates the Bayesian approximate measurement invariance (MI) approach in M plus with longitudinal data and small sample size. Approximate MI incorporates zero-mean small variance prior distributions on the differences between parameter estimates over time. Contrary to traditional invariance testing methods, where exact invariance is tested, this method allows for some “wiggle room” in the parameter estimates over time. The...