Table 7.
Discriminant validity.
| Constructs | AVEa | PU | PR | IU | RB | EHC | SN | PEOU | PBC | TR |
| Perceived usefulness (PU) | 0.431 | 0.657b | —c | — | — | — | — | — | — | — |
| Perceived risks (PR) | 0.462 | –0.266 | 0.680 | — | — | — | — | — | — | — |
| Intention to use (IU) | 0.506 | 0.458 | –0.364 | 0.711 | — | — | — | — | — | — |
| Resistance bias (RB) | 0.524 | –0.318 | 0.424 | –0.374 | 0.724 | — | — | — | — | — |
| Eye health consciousness (EHC) | 0.625 | 0.309 | –0.179 | 0.277 | –0.272 | 0.791 | — | — | — | — |
| Subjective norms (SN) | 0.512 | 0.432 | –0.289 | 0.471 | –0.236 | 0.179 | 0.716 | — | — | — |
| Perceived ease of use (PEOU) | 0.516 | 0.430 | –0.223 | 0.324 | –0.244 | 0.171 | 0.296 | 0.718 | — | — |
| Perceived behavioral control (PBC) | 0.408 | 0.383 | –0.360 | 0.374 | –0.116 | 0.181 | 0.453 | 0.380 | 0.639 | — |
| Trust (TR) | 0.429 | 0.343 | –0.332 | 0.422 | –0.152 | 0.126 | 0.458 | 0.247 | 0.411 | 0.655 |
aAVE: average variance extracted.
bThe items on the diagonal in italics represent the square root of the AVE; off-diagonal elements are the correlation estimates.
cNot applicable.