The serial multiple mediator model is currently only implemented for one independent variable of interest. This is not a big limitation, since the user can run several models using the respective other independent variables as control variables. But for completeness, this should be implemented in a similar manner to the parallel multiple mediator model.
The serial multiple mediator model is currently only implemented for one independent variable of interest. This is not a big limitation, since the user can run several models using the respective other independent variables as control variables. But for completeness, this should be implemented in a similar manner to the parallel multiple mediator model.