Exact(5)
Duns Scotus's effort was to show that the perfect mediation would be preventative, not merely curative.
Perfect mediation is established if the association between depression and QoL is reduced to zero.
If the IV has no effect when the MV is controlled, then this is indicative of perfect mediation.
As Baron and Kelly (1986) noted, "in psychological research a perfect mediation is a rare phenomena, but also in partial mediation, a significant reduction in the association between independent and dependent variable, demonstrates that a given mediator indeed is a potent, albeit not both necessary and sufficient condition for an effect to occur".
When adding the proposed mediator (depressive mood) to the linear regression model (step 2 in Table 3), the social support coefficient decreased to Bc' = 0.438 (SE = 0.457) and lost statistical significance (p = 0.338), suggesting perfect mediation according to Baron and Kenny.
Similar(55)
This mediation was perfect based on the definition of Baron and Kelly (1986).
A former litigator, Kristen served both Senator Edward M. Kennedy and Senator Debbie Stabenow, advising on a variety of policy issues while perfecting her negotiation and mediation skills.
Mediate: Everything Mediation, 2016.
Mediator and Mediation Trainer.
We felt it was a perfect fit for his diplomacy, mediation and executive state leadership skills.
At present, I see no measure which is satisfactory under all circumstances, so the quest for the perfect measure of effect size in mediation should go on.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com