School of Psychology

Simple Slopes Computations for Continuous Moderator
  Variance of Main Effect
Variance of Interaction
Covariance of Main Effect and Interaction
Number of Subjects in your Study
B of Main Effect
Mean of Moderator
Standard Deviation of Moderator
B of Interaction Term
WARNING: If you find that standard errors cannot be computed (you will receive the following output: NAN), recheck that you are inputting exactly the correct numerical values. If this problem persists, then enter values to at least five decimal points. Occasionally computational errors can occur due to rounding.
Simple Slope for the high level of The Moderating Variable  
Simple Slope for the medium level of The Moderating Variable  
Simple Slope for the low level of The Moderating Variable  
Standard error for the high level of The Moderating Variable  
Standard error for the medium level of Moderating Variable  
Standard error for the low level of Moderating Variable p-values
t-value for the high level of Moderating Variable  
t-value for the medium level of Moderating Variable  
t-value for the low level of Moderating Variable  
Degrees of freedom  

 

Refer to the INSTRUCTIONS page if you are unsure of how to enter statistical information.


Reminders:

1) The four values in the upper right hand corner should be brought forward from the previous page. If not, then you have a problem.


2) The four values in the upper left hand corner should be obtained from your statistical output. In SPSS, for example, you must request for the covariance matrix to be produced during the regression analysis in order to have this information.


3) Be certain that you have selected the correct variances and covariance. Their position in the matrix may vary from the example I give elsewhere in this site. Do not enter a value of zero (e.g., .000) as a variance on covariance