We tested whether sense of control mediated the effect of perceived knowledge on emotional well-being. We ran a mediation analysis using a bootstrapping technique with 10,000 resamples (Model 4, Hayes, 2013). This analysis indicated that perceived knowledge had a significant positive effect on sense of control (a = .37, SE = .02, t = 20.49, p < .001) and that sense of control had a significant positive effect on emotional well-being (b = .23, SE = .02, t = 12.49, p < .001). Moreover, the otherwise significant direct effect of perceived knowledge on emotional well-being (c = .07, SE = .02, t = 3.55, p < .001) became non-significant (c’ = -.02, SE = .02, t = -.97, p = .33) after the indirect effect through sense of control was taken into account. The 95% bias corrected confidence interval for the indirect effect did not include 0 (95% CI = [.07, .10]), indicating a significant mediation. That is, sense of control mediated the relationship between perceived knowledge and emotional well-being.