Table 3.
Results of polynomial regression analysis for task crafting and the response surface test.
| Variable | Task Crafting | |||||
|---|---|---|---|---|---|---|
| Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | ||
| Control variables | ||||||
| Class dummy 1 | −0.06 | −0.03 | −0.01 | −0.07 | −0.07 | |
| Class dummy 2 | −0.04 | −0.03 | −0.02 | −0.05 | −0.09 | |
| Grade dummy 1 | 0.06 | 0.12 | 0.14 | 0.12 | 0.07 | |
| Grade dummy 2 | −0.05 | 0.04 | 0.06 | 0.04 | −0.03 | |
| Grade dummy 3 | 0.08 | 0.13 | 0.14 | 0.10 | 0.08 | |
| Main effect | ||||||
| Openness to experience (OE) | 0.21 ** | |||||
| Skill variety (SV) | 0.35 *** | |||||
| Task significance (TS) | 0.19 ** | |||||
| Task identity (TI) | 0.06 | |||||
| Polynomial terms | ||||||
| OE | 0.21 ** | |||||
| SV | 0.48 *** | |||||
| OE2 | 0.02 | |||||
| OE × SV | −0.10 | |||||
| SV2 | 0.07 | |||||
| OE | 0.26 ** | |||||
| TS | 0.38 *** | |||||
| TS2 | −0.12+ | |||||
| OE × TS | 0.08 | |||||
| TS2 | 0.00 | |||||
| OE | 0.29 *** | |||||
| TI | 0.30 *** | |||||
| OE2 | −0.06 | |||||
| OE × TI | 0.02 | |||||
| TI2 | 0.00 | |||||
| F | 0.45 | 11.32 | 8.80 | 6.66 | 4.97 | |
| R2 | 0.01 | 0.38 | 0.34 | 0.28 | 0.23 | |
| Change in R2 | 0.37 *** | 0.33 *** | 0.27 *** | 0.21 *** | ||
| Surface response test | ||||||
| Y = X | Slope (a1 = b1 + b2) | 0.61 *** | 0.56 *** | 0.52 *** | ||
| Curvature (a2 = b3 + b4 + b5) | −0.02 | 0.01 | −0.01 | |||
| Y = −X | Slope (a3 = b1 − b2) | −0.28 * | −0.15 | −0.07 | ||
| Curvature (a4 = b3 − b4 + b5) | 0.19 | −0.16+ | −0.07 | |||
+ p < 0.10, * p < 0.05, ** p < 0.01, *** p < 0.001.