Table 21.
Validity evaluation of discriminant validity.
| Dimension | Convergent validity | Discriminant validity | |||||||
|---|---|---|---|---|---|---|---|---|---|
| AVE | PU | PI | PR | PC | TI | OC | PV | PA | |
| PU | 0.860 | 0.927 | |||||||
| PI | 0.756 | 0.694 | 0.869 | ||||||
| PR | 0.711 | −0.311 | −0.289 | 0.843 | |||||
| PC | 0.635 | 0.144 | 0.143 | 0.140 | 0.797 | ||||
| TI | 0.702 | 0.722 | 0.708 | −0.321 | 0.210 | 0.838 | |||
| OC | 0.627 | 0.750 | 0.683 | −0.319 | 0.271 | 0.843 | 0.792 | ||
| PV | 0.788 | 0.722 | 0.787 | −0.376 | 0.091 | 0.738 | 0.720 | 0.888 | |
| PA | 0.852 | 0.838 | 0.725 | −0.351 | 0.227 | 0.768 | 0.761 | 0.767 | 0.923 |
Note: (1) PU = perceived usefulness; PI = platform information; PR = perceived risk; PC = perceived cost; TI = teacher influence; OC = online comments; PV = perceived value; PA = parental attitude; AVE = convergence validity. (2) The diagonal elements in the matrix are AVE square root values, and the nondiagonal elements represent the correlation of related dimensions.