the IPM and is considered more parsimonious than the IPM, if it fits as well to the data. Because the CPM is nested within the IPM, the fits of the two models can be formally compared. Two indices were used to determine the best-fitting multivariate model: the Satorra-Bentler scaled chi-square difference test and the Akaike information criterion (AIC). The AIC represents a balance between model fit and parsimony, with lower values of AIC indicating the more suitable model.
