Sobel Test Calculator for the Significance of Mediation
http://www.danielsoper.com/statcalc/calc31.aspx
This calculator uses the Sobel test to tell you whether a mediator variable significantly carries the influence of an independent variable to a dependent variable; i.e., whether the indirect effect of the independent variable on the dependent variable through the mediator variable is significant. This calculator returns both the one-tailed and two-tailed probability values.
Macros (SPSS and SAS) and Script (SPSS only) for Estimating Indirect Effects in Simple Mediation Models
