SmartPLS4 Series 36 - How to Report Moderated Mediation Analysis?

Role ambiguity weakens the indirect pathway between collaborative culture and organizational performance through Assurance—an effect that holds even though the indirect effect remains statistically significant at low, mean, and high levels of role ambiguity. In other words, collaborative culture still boosts organizational performance via Assurance, but the strength of that mediated link depends on how ambiguous roles are.

The analysis uses a moderated mediation (conditional mediation) setup in SmartPLS4: collaborative culture (X) influences Assurance (M), which then affects organizational performance (DV), while role ambiguity moderates the X→M link. The core evidence comes from a significant index of moderated mediation, indicating that the indirect effect changes as role ambiguity changes. The moderation on the X→M relationship is also significant, with the reported t statistic exceeding the one-tailed threshold (1.645), and the sign implies negative moderation—higher role ambiguity weakens the collaborative culture → Assurance relationship.

Reporting begins with the direct paths. The path from collaborative culture to Assurance is significant, and role ambiguity significantly moderates that relationship. The direct effect of Assurance on organizational performance is significant as well, and the indirect effect from collaborative culture to organizational performance through Assurance is significant (p < .01). Because both the direct and indirect effects are significant, Assurance partially mediates the relationship between collaborative culture and organizational performance.

The moderated mediation results then focus on conditional indirect effects. At low, mean, and high levels of role ambiguity, the indirect effect remains significant—so the mediation does not disappear. However, the indirect effect is weaker when role ambiguity is higher. The change across levels is statistically supported by the significant index of moderated mediation, along with confidence intervals and a p value reported for the index. The transcript highlights that the indirect effect is strongest at low role ambiguity (reported as 0.2298) and becomes reduced at the mean and further weakened at higher role ambiguity.

To visualize and further substantiate the pattern, the analysis uses slope analysis (conditional indirect effects plotted across moderator levels). The graph is interpreted using the central line (indirect effect at the moderator mean) and the upper and lower bounds (confidence limits). The slope pattern matches the earlier numerical findings: as role ambiguity increases, the conditional indirect effect declines. The transcript also notes that a Johnson–Neyman plot can be used when the moderator is treated as continuous, helping identify regions of significance.

In text reporting, the results are summarized by stating the significant index of moderated mediation (including the estimate, standard error, confidence interval, and p value) and then comparing conditional indirect effects at low versus high role ambiguity. The final takeaway is straightforward: the moderated mediation model is supported because increasing role ambiguity reduces the indirect effect of collaborative culture on organizational performance through Assurance, with slope analysis providing additional confirmation.