The 2 class, 1 factor model with class specific item thresholds and class invariant factor loadings, means and variances proved the best fit when comparing levels of measurement invariance. The 2 class, 1 factor model was either not identified or did not converge when thresholds and factor means were class specific or when variances and thresholds were class specific. All other models converged, albeit with an increased number of random starts and final stage optimizations.
