Table 4.
Hierarchical multiple regression analysis to predict behavior first from the theory of planned behavior variables and then from Self-efficacy (n=120)
| Predictor | R square | R square change | Adjusted R square | B | Beta | t | Sig |
|---|---|---|---|---|---|---|---|
| Step 1 | |||||||
| Instrumental attitude | 0.157 | 0.157 | 0.150 | 4.792 | 0.396 | 4.687 | 0.0001 |
| Affective attitude | 0.155 | 0.983 | 0.327 | ||||
| Subjective norm | 0.158 | 1.625 | 0.107 | ||||
| PBC | -0.019 | -0.132 | 0.895 | ||||
| Intention | 0.185 | 1.949 | 0.054 | ||||
| Step 2 | |||||||
| Instrumental attitude | 0.157 | 0.157 | 0.150 | 2.623 | 0.217 | 2.110 | 0.037 |
| Self-efficacy | 0.213 | 0.056 | 0.200 | 3.853 | 0.298 | 2.896 | 0.005 |
Note. Non significant predictors in step 1 are not shown in step 2.
PBC=Perceived behavioral control; B: unstandarized coefficients; t: test statistic