Re: [R] Incorrect degrees of freedom in SEM model using lavaan

Dear Andrew, The reported df in lavaan is 0 which is correct. It is because this path model is saturated. "28" is not the df, it is the no. of pieces of information. The no. of parameter estimates is also 28. Thus, the df is 0. However, you are correct that there are only 13, not 28, free paramet

Re: [R] Incorrect degrees of freedom in SEM model using lavaan

Your model is saturated. I think lavaan calculates the number of degrees of freedom this way: DF = n*(n + 1)/2 - t - n.fix*(n.fix + 1)/2 n = number of variables t = number of free parameters n.fix = number of fixed exogenous variables So, if you fix the exogenous variables, as in mimic = "Mplus

[R] Incorrect degrees of freedom in SEM model using lavaan

I have been trying to use lavaan (version 0.4-7) for a simple path model, but the program seems to be computing far less degrees of freedom for my model then it should have. I have 7 variables, which should give (7)(8)/2 = 28 covariances, and hence 28 DF. The model seems to only think I have 13 D