Fifth, we found from mixture analysis that heterogeneity existed even among the non-improved group. Factors that differentiate the three subgroups and their long-term trajectories may be of interest in order to develop more intensive treatment models for these high-risk groups. The present study did not have sufficient sample size to conduct comparative analysis on these groups. A larger scale study of mandated students will allow for researchers to examine whether the three distinctive groups, identified based on statistical considerations such as the BIC and entropy statistics, can be useful in practice (Everitt, Landau, & Leese, 2001; Muthén & Muthén, 2000).
