A tutorial on estimating 'true-score' multitrait-multimethod models with lavaan in R

This report gives a short description of the "true score multitrait-multimethod" (TS-MTMM) model, and demonstrates how this model can be estimated using R and the package lavaan. Using European Social Survey data from round 3, an example analysis is discussed and calculations show how estimates from the TS-MTMM model can be used to obtain estimates from "basic MTMM" models and vice versa.