Lynn Imai posted on Friday, October 06, 2006 - 12:47 am
Dear Prof(s) Muthen,
I am trying to use path analysis to test a model. I have one main predictor of theoretical interest (a type of personality variable), leading to a process variable, which then influences an outcome variable.
I have 7 other variables I need to control for to see if my main exogenous variable predicts over and beyond the others.
My questions are:
1) Is it common practice to use a partialled out covariance matrix to free up degrees of freedom, instead of explicitly modeling all control variables in path analysis
It is not common practice to analyze a residual matrix in my experience. It is always better to do an anlysis in one step rather than more than one. I would include that control variables in the model as covariates.