2004) for 1 to 9 class solutions (resulting in 81 potential solutions) were investigated with Matlab version 7.1.0.124 (The Mathworks, 2005). Model fit was evaluated by comparing Bayesian information criteria (BIC) among the 81 potential mixture model solutions. To allow for missing data, the solution that best fit the data was then estimated in Mplus version 5.1 (Muthén and Muthén, 2007) using full information maximum likelihood, which assumes that data are missing at random.1
