The Mplus Users's Guide discusses this on pages 649 and 650. Variables that are used in STANDARDIZE cannot be used in subsequent DEFINE statements. If you want to standardize READSS and use those values in the CLUSTER_MEAN function, you must do this in 2 steps - first step is to standardize READSS and save the data. The second step is to use it in CLUSTER_MEAN.
may_k posted on Friday, January 04, 2019 - 1:52 am