Multilevel Modeling and Latent Growth Curve Modeling

[@SarahCharles92]

Thank you so much for these useful and interesting videos. Would you be able to make a video showing how one codes a curvilinear (e.g., parabolic/quadratic) mixed model in either SPSS or R? You already demonstrated how one might do that using a latent growth modelling approach in MPlus in one of your other videos, but I would like to know how to do so in the mixed model framework and find your delivery style incredibly easy to understand.