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...do a confirmatory factor analysis to check if the posited relationship holds in the current data being analyzed. I thought the way out would be to use SEM - the structural equation model library. However, i am not sure how to estimate SEM objects where factors are unobservable. The only discussion pertian to the case of endogenously detemined observable variables. here is a test case of what i'd like to implement #example Measurement Model x1<-runif(200) x2<-rbinom(200, 20, 0.75) x3<-runif(200) x4<-runif(200) dat<-as.data.frame(x1 =x1, x2 = x2, x3 = x3, x4 = x4) v.c<-cor(da...