Moderated Mediation in AMOS
Moderated MEdiation in AMOS
The series of tutorials from the very basic to the advance will help research scholar advance their knowledge in Moderated Mediation using SPSS AMOS.
Moderated Mediation
- In more complex models, you may have a mediation model that also has a moderator on one of the indirect paths.
- Not only are you trying to determine if mediation is present, but you are also trying to see if a moderator is changing the strength of the indirect effect.
- The easiest way to tackle this issue is to use the estimands function in AMOS outlined in the mediation tutorial.
- Let’s look at our moderation example again, only now we are going to examine if the moderator is influencing the indirect effect. Our simple mediation test will be if Organizational Commitment leads to Collaborative Culture, which leads to Organizational Performance.
- Our moderator will be the construct of Role Ambiguity, which negatively influences the relationship from Organizational Commitment to Organizational Performance through Collaborative Culture. See the graphical representation that follows.
Proposed Model
- In AMOS, we drag in our constructs and include the paths for mediation. We also include the moderator and the interaction term into the model.
- Note the interaction term needs to be created by the mean centered variables as outlined in the moderation examples presented earlier.
- After we have drawn the model, we label all the parameter estimates. This will be necessary when we start using the estimands function in AMOS.
Define Estimand
- In the estimands function, we are going to examine the indirect effects at different levels of the moderator. In AMOS, we are going to select the “Define new estimands” function which will bring up a pop-up window.
- The indirect effect is the product of the A_Path and the B_Path. Initially, we are going to tell AMOS to calculate the labeled parameter “A_Path” by the “B_Path”. This is going to determine the indirect effect in the presence of the moderator.
- Make sure the moderator and interaction term are included in the model; we are not trying to piecemeal the analysis.
- Next, we need to “probe” the indirect effect to determine how the moderator influences the indirect effect when it is at different levels.
- In the estimands function, let’s label these tests “OneStandBelow” and “OneStandAbove”. This will denote that the moderator is one standard deviation below the mean and one standard deviation above the mean. The standard deviation for Role Ambiguity is 1.36595.
Video Tutorial 1
How to Test Moderated Mediation (Single Indirect Effect) – Part 1
Video Tutorial 2
How to Test Moderated Mediation (Part 2) – Multiple Indirect Effects
Video Tutorial 3
The session focuses on how to perform Moderated Mediation Analysis using SPSS AMOS. The model analyzed is similar to Hayes Process Macro Model 14.
Additional Literature Review Resources
- IBM SPSS AMOS Lecture Series – Basics
- IBM SPSS AMOS Series – 2 – What is Structural Equation Modelling
- IBM SPSS AMOS Series – 4 – Introduction to AMOS
- Introduction to Confirmatory Factor Analysis (CFA)
- IBM SPSS AMOS Series – Factor Loadings and Fit Statistics
- First Measurement Model in AMOS
- Building a Basic Model in SPSS AMOS
- Confirmatory Factor Analysis and Analyzing SPSS AMOS Output
- Understanding, Assessing, and Improving Model fit in SPSS AMOS
- Assessing Construct Reliability and Convergent Validity in SPSS AMOS
- How to Assess Discriminant Validity in SPSS AMOS
- Reporting Measurement Model – Fit Indices, Reliability and Validity
- Common Method Bias in SPSS AMOS
- Common Method Bias using Latent Common Method Factor
- SPSS AMOS Assessing Normality of Data
- Basic/First Structural Model in SPSS AMOS
- Full Structural Model Analysis
- SPSS AMOS Mediation Analysis
- Mediation Analysis with Multiple Mediators
- Serial Mediation Analysis in SPSS AMOS
- Moderation Anlaysis in SPSS AMOS
- Moderation Analysis with Categorical Moderator in SPSS AMOS