dear drs. Muthén, I have a doubt about how to calculate the standardized coefficient of an indirect effect involving binary covariates.
Specifically, I have paths from A to B to Y where A and B are binary and Y is continuous. For direct effects, I'd estimate the STDY with the ratio of STDYX to stddev(X), but here I have an independent and a mediator. What should I use for stddev(X)?