Timeline for Why are the AD, ACME and Prop. Mediated identical for control and treated groups in mediation analysis?
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| Aug 16, 2023 at 5:54 | comment | added | Jade | To correct my comment above, I don't think it would technically be moderated mediation, as it isn't a separate covariate that is moderating the effect of either the treatment or moderator. That said, I think the interpretation (that the mediation effect is present in the treated group but not the control group) still stands. | |
| Aug 16, 2023 at 5:05 | comment | added | Jade | Thank you! I initially tested for a treatment-mediator interaction and didn't find one, which is why I didn't include an interaction term in fm3. However, now that I have re-run the mediation analysis with the interaction term just to see, the ACME/indirect effect is only significant in the treated group. I presume this is showing moderated mediation, i.e. that the mediator mediates the effect in the treated group, but not in the control group.? Is it still justified to include the interaction term and infer moderated mediation, even when it was not significant to begin with? | |
| Aug 15, 2023 at 18:36 | history | answered | Noah | CC BY-SA 4.0 |