I am interested in comparing groups of people (n = 4) in terms of their patterns of growth over four time points. The focus of this analysis is a hypothesized interaction between time and group.
Ordinarily this could be done in a simple repeated measures ANOVA (with a within and between subject factors). But because of missing data, I would like to take advantage of Mplus's capacity to handle missing data.
Is there a method in Mplus using either a multiple group or a structural equation format that would accommodate this analysis? Also, would there be a way to conduct post hoc analyses, such as a simple effect of time for each group? (I imagine just examining the significance of the slope parameter by group would permit this.)