Suppressor variables

[Karen Wood]

        There seems to be at least three tests that I have come across for suppressor variables. What, if any, are you using? I have included some output below.


Karen
                                                                                Results of Hierarchical analyzes
                                                                                         Beta coefficient


                          X1(numerical ability)                                       X2 (verbal ability)                                         X3 (fluid intelligence measure)

Step 1                             0.62

Step 2                              0.68                                                         -0.10    

                 

Step 1                             0.62                                

Step 2                             0.70                                                                                                                 -0.16    



                                                                                zero-order correlations



X1                        __                                                    0.57***                                                                 0.49***                                               

X2                                                                                                                                                      0.30*

X3

Y                0.62***                                                        0.29*                                                                   0.18     

[Johnny Amora]

Why dont you use SEM, instead, to handle suppressor variable?
A reference is:

Testing Mediation and Suppression Effects of Latent Variables: Bootstrapping With Structural Equation Models
Gordon W. Cheung and Rebecca S. Lau
Organizational Research Methods 2008; 11; 296 originally published online Jul 23, 2007;DOI: 10.1177/1094428107300343
The online version of this article can be found at:

http://orm.sagepub.com/cgi/content/abstract/11/2/296

--Johnny






--- On Wed, 3/18/09, Karen Wood <[hidden email]> wrote:

From: Karen Wood <[hidden email]>
Subject: Suppressor variables
To: [hidden email]
Date: Wednesday, 18 March, 2009, 8:16 AM

         There seems to be at least three tests that I have come across for suppressor variables. What, if any, are you using? I have included some output below.


Karen
                                                                                 Results of Hierarchical analyzes
                                                                                         Beta coefficient


                           X1(numerical ability)                                         X2 (verbal ability)                                           X3 (fluid intelligence measure)

Step 1                               0.62

Step 2                               0.68                                                           -0.10    

                 

Step 1                               0.62                                

Step 2                               0.70                                                                                                                  -0.16    



                                                                                 zero-order correlations



X1                          __                                                     0.57***                                                                  0.49***                                               

X2                                                                                                                                                        0.30*

X3

Y                  0.62***                                                         0.29*                                                                    0.18     

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