School of Psychology

Simple Slopes Computations for Categorical Moderator
Variance of Main Effect
Variance of Interaction
Covariance of Main Effect and Interaction
Number of Subjects in your Study
 B of Main Effect
 B of Interaction Term
 
 
 
 
 
 

 
 Simple Slopes for the comparison group:    
 Simple Slope for the dummy coded group:  
 Standard error for the comparison group:  
 Standard error for the dummy coded group: p-values 
 t-value for the comparison group:     
 t-value for the dummy coded group:      
 Degrees of freedom  

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


Reminders:

1) The two 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.