Questionnaire source and number of items
| Constructs | No. of items | Sources |
|---|---|---|
| Perceived usefulness (PU) | 7 | Trinh and Vuong (2017) |
| Perceived risk (PR) | ||
| FIR | 4 | Hanafizadeh and Khedmatgozar (2012) |
| PER | 4 | Yang et al. (2015) |
| SOR | 4 | Yang et al. (2015) |
| PSR | 3 | Yang et al. (2015) |
| TIR | 3 | Yang et al. (2015) |
| SER | 4 | Hanafizadeh and Khedmatgozar (2012) |
| PRR | 4 | Hanafizadeh and Khedmatgozar (2012) |
| Perceived ease of use (EOU) | 5 | Trinh and Vuong (2017) |
| Social influence (SI) | 4 | Trinh and Vuong (2017) |
| Intention to use credit card (IU) | 4 | Trinh and Vuong (2017) |
| Constructs | No. of items | Sources |
|---|---|---|
| Perceived usefulness (PU) | 7 | |
| FIR | 4 | |
| PER | 4 | |
| SOR | 4 | |
| PSR | 3 | |
| TIR | 3 | |
| SER | 4 | |
| PRR | 4 | |
| Perceived ease of use (EOU) | 5 | |
| Social influence (SI) | 4 | |
| Intention to use credit card (IU) | 4 |