| Attribute | Level | Utility value | Importance weight % |
| Shape | Plane | −1.280 | 55.454 |
| Quasi-stereoscopic | .800 | ||
| Three-dimensional | .480 | ||
| Structure | Symmetry | −270 | 20.816 |
| Asymmetry | .270 | ||
| Color | red | .220 | 23.731 |
| others | −.220 | ||
| Pearson’s R: .969*** | Kendall’s tau: .786** | ||