A

**sobel test**is used to determine whether or not the indirect effect of an independent variable on a dependent variable through a mediator variable is significant. A sobel test uses the following formula to calculate a test statistic:**Sobel test statistic**= (a*b) /√(b

^{2}*s

_{a}

^{2}+ a

^{2}*s

_{b}

^{2})

where

*a*is the raw regression coefficient for the association between the independent variable and the mediator,*s*is the standard error of_{a}*a*,*b*is the raw coefficient for the association between the mediator and the dependent variable, and*s*is the standard error of_{b}*b*.To conduct a sobel test, simply fill in the values below and then click the “Calculate” button.

Sobel test statistic: **2.306820**

One-tailed probability: **0.010532**

Two-tailed probability: **0.021065**