Table 5 Results of hierarchical multiple regression analysis regarding the contribution of demographic and organizational characteristics, procedural justice, and distributive justice to the explanation of variance of POS
Predictor | betas a | tvalue | R2 | R2change |
|---|---|---|---|---|
| Â | The first step | Â | Â | Â |
Demographic characteristics | Â | Â | Â | Â |
 Sex | .01 | .17 |  |  |
 Age | -.11 | −1.83 |  |  |
 Educational level | -.05 | −1.00 |  |  |
 Tenure | -.09 | −1.51 |  |  |
 Job title | .00 | .03 |  |  |
 Income level | .00 | -.03 |  |  |
 Total |  | 1.87** | .04 |  |
Organizational characteristics | Â | Â | Â | Â |
 School level | −0.10 | .25 |  |  |
 Subject level | −0.12 | −1.81 |  |  |
 Total |  | 1.30 | .01 |  |
Total of covariates | Â | 1.72** | .04 | .04 |
| Â | The second step | Â | Â | Â |
Organizational justice | Â | Â | Â | Â |
 Procedural justice | .41 | 9.57*** |  |  |
 Distributive justice | .35 | 8.23*** |  |  |
 Total |  | 17.29*** | .49 | .49 |
Total of all predictors | Â | 8.04*** | .53 | Â |