Table 2.
Hierarchical regression results for examining the mediation role of UA, UI in BC prediction in the adopted mTAM model (Figures 2, 3).
| Hierarchical Regression path | R2 | adj R2 | Coefficient (SE) | F (dfM, dfR) | t | p | 95% CI | |||
|---|---|---|---|---|---|---|---|---|---|---|
| No | Independent variable | Mediating variable | Dependent variable | |||||||
| 1 | UA | - | BC | 0.322 | 0.310 | 0.640 (0.122) | 27.16 (1.57) | 5.21 | *** | [0.394:0.886] |
| 2 | UA | 0.456 | 0.436 | −0.071 (0.215) | 23.09 (2.,55) | −0.33 | 0.742 | [−0.504:0.361] | ||
| UI | 0.295 (0.078) | 3.77 | *** | [0.138:0.452] | ||||||
| Mediation effect of UI (Path No 1 vs. Path No 2) | R2 diff= 0.134 | adj R2 diff=0.126 | 12.385 (1.55) | 0.001 | ||||||
Adj, Adjusted coefficient of determination R2; SE, Standard Error; F(dfM,dfR): F-statistics with dfM and dfR corresponding to the degrees of freedom for the model and the residual, respectively; CI, Confidence Interval; UA, Usage Attitude; UI, Usage Intention; BC, Behavior Change, *** p < 0.001.