Table 3.
Mediation Effects of Knowledge and Expectations
| (3a) Mediation of the effect of attitudes on intention through knowledge and expectations | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Point Estimate | Product of Coefficients | Bootstrapping | |||||||
| Percentile 95% CI | BC 95% CI | BCa 95% CI | |||||||
| SE | Z | Lower | Upper | Lower | Upper | Lower | Upper | ||
| Mediators: | Indirect Effects | ||||||||
| Knowledge | 0.0151 | 0.0071 | 2.1378 | 0.0023 | 0.0325 | 0.0032 | 0.0353 | 0.0033 | 0.0356 |
| Expectations | 0.1415 | 0.0237 | 5.9738 | 0.0906 | 0.1989 | 0.0924 | 0.2014 | 0.0902 | 0.1987 |
| Total | 0.1566 | 0.0246 | 6.369 | 0.1083 | 0.2123 | 0.1104 | 0.2159 | 0.1092 | 0.2138 |
| Contrasts | |||||||||
| Knowledge vs. Expectations | -0.1264 | 0.0249 | -5.0881 | -0.1897 | -0.0701 | -0.1910 | -0.0712 | -0.1874 | -0.0682 |
| (3b) Mediation of the effect of subjective norms on intention through knowledge and expectations | |||||||||
| Point Estimate | Product of Coefficients | Bootstrapping | |||||||
| Percentile 95% CI | BC 95% CI | BCa 95% CI | |||||||
| SE | Z | Lower | Upper | Lower | Upper | Lower | Upper | ||
| Mediators: | Indirect Effects | ||||||||
| Knowledge | 0.0139 | 0.0067 | 2.0785 | 0.0021 | 0.0316 | 0.0029 | 0.0334 | 0.0029 | 0.0334 |
| Expectations | 0.1096 | 0.0210 | 5.2110 | 0.0682 | 0.1564 | 0.0689 | 0.1568 | 0.0675 | 0.1556 |
| Total | 0.1235 | 0.0219 | 5.6289 | 0.0829 | 0.1708 | 0.0833 | 0.1712 | 0.0820 | 0.1699 |
| Contrasts | |||||||||
| Knowledge vs. Expectations | -0.0957 | 0.0222 | -4.3130 | -0.1464 | -0.0481 | -0.1460 | -0.0477 | -0.1433 | -0.459 |
| (3c) Mediation of the effect of perceived behavioral control on intention through knowledge and expectations | |||||||||
| Point Estimate | Product of Coefficients | Bootstrapping | |||||||
| Percentile 95% CI | BC 95% CI | BCa 95% CI | |||||||
| SE | Z | Lower | Upper | Lower | Upper | Lower | Upper | ||
| Mediators: | Indirect Effects | ||||||||
| Knowledge | 0.0102 | 0.0047 | 2.1396 | 0.0014 | 0.0227 | 0.0020 | 0.0247 | 0.0020 | 0.0250 |
| Expectations | 0.0351 | 0.0157 | 2.2296 | 0.0034 | 0.0692 | 0.0043 | 0.0706 | 0.0041 | 0.0701 |
| Total | 0.0453 | 0.0163 | 2.7749 | 0.0108 | 0.0814 | 0.0120 | 0.0820 | 0.0114 | 0.0818 |
| Contrasts | |||||||||
| Knowledge vs. Expectations | -0.0250 | 0.0166 | -1.5051 | -0.0598 | 0.0083 | -0.0612 | 0.0069 | -0.0604 | 0.0076 |
Point estimate refers to the estimated regression product-of-coefficients for the ab-path. It captures the indirect effect of the independent variable X on the dependent variable Y through mediators and. SE refers to the standard error of the mediation model and Z refer is the asymptotic critical ratio given as the ratio between total indirect effects to the square root of the variance of the total indirect effects; $$$