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Advanced concepts in Mediation and Moderation
Michael [email protected]
Workshop on Research Methods at GUDMS
Advanced concepts in Mediation and Moderation
• Mediated – Moderation
• Moderated- Mediation
Workshop on Research Methods at GUDMS
Mediated – Moderation
Workshop on Research Methods at GUDMS
Mediated - Moderation
• Interaction effect of X and Z is transmitted through M on Y
X
Z
YM
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z predicts Y
• Step 2: X . Z predicts M
• Step 3: M predicts Y while controlling X , Z and X. Z
• Step 4: X.Z on Y no longer significant when controlling M
Workshop on Research Methods at GUDMS
Mediated - Moderation
• Step1: X . Z predicts Y
X
Z
YM
x
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z predicts Y
• Step 2: X . Z predicts M
• Step 3: M predicts Y while controlling X , Z and X. Z
• Step 4: X.Z on Y no longer significant when controlling M
Workshop on Research Methods at GUDMS
Mediated - Moderation
• Step 2: X . Z predicts M
X
Z
YM
x
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z predicts Y
• Step 2: X . Z predicts M
• Step 3: M predicts Y while controlling X , Z and X. Z
• Step 4: X.Z on Y no longer significant when controlling M
Workshop on Research Methods at GUDMS
Mediated - Moderation
• Step 3: M predicts Y while controlling X , Z and X. Z
X
Z
YM
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z predicts Y
• Step 2: X . Z predicts M
• Step 3: M predicts Y while controlling X , Z and X. Z
• Step 4: X.Z on Y no longer significant when controlling M
Workshop on Research Methods at GUDMS
Mediated - Moderation
• Step 4: X.Z on Y no longer significant when controlling M
X
Z
YM
X
Workshop on Research Methods at GUDMS
Moderated Mediation
Workshop on Research Methods at GUDMS
Moderated- Mediation
• M mediates the relationship between X & Y , but fourth variable moderates the relationship.
X M Y
Z
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z significant predicting Y
• Step 2: X significantly relates to M
• Step 3: X. Z does not predict Y controlling X,M,Z and M.Z
• Step 4: M.Z uniquely predicts Y controlling X,M,Z and X.Z
Workshop on Research Methods at GUDMS
Moderated- Mediation
• Step1: X . Z significant predicting Y
X M Y
ZX
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z significant predicting Y
• Step 2: X significantly relates to M
• Step 3: X. Z does not predict Y controlling X,M,Z and M.Z
• Step 4: M.Z uniquely predicts Y controlling X,M,Z and X.Z
Workshop on Research Methods at GUDMS
Moderated- Mediation
X M Y
Z
Step 2: X significantly relates to M
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z significant predicting Y
• Step 2: X significantly relates to M
• Step 3: X. Z does not predict Y controlling X,M,Z and M.Z
• Step 4: M.Z uniquely predicts Y controlling X,M,Z and X.Z
Workshop on Research Methods at GUDMS
Moderated- Mediation
• Step 3: X. Z does not predict Y controlling X,M,Z and M.Z
X M Y
ZX
Workshop on Research Methods at GUDMS
Testing Methodology
Hierarchical Multiple Regression
• Step1: X . Z significant predicting Y
• Step 2: X significantly relates to M
• Step 3: X. Z does not predict Y controlling X,M,Z and M.Z
• Step 4: M.Z uniquely predicts Y controlling X,M,Z and X.Z
Workshop on Research Methods at GUDMS
Moderated- Mediation
• Step 4: M.Z uniquely predicts Y controlling X,M,Z and X.Z
X M Y
Z
x
Workshop on Research Methods at GUDMS
Thank you
Workshop on Research Methods at GUDMS
