After my last Stats Help page on the “Sobel Test Formula for Serial Mediation / Sequential Mediation,” hereby called serial mediation, I realized that an adequate calculator for serial mediation sobel tests did not exist. Of course, Hayes’s PROCESS macro in SPSS will calculate sobel tests for serial mediation, but it does so in a simple regression framework. So, I created a calculator in excel which can be used in other frameworks, and it is now included at this link. Also, the link provides all required information to use the calculator.
As always, email me at firstname.lastname@example.org if you have any questions!