Table 4. Measurement items and results of Post-Study System Usability Questionnaire.
| Items | Measurement | Results | Construct # |
|---|---|---|---|
| 1 | The system is easy to use | 5.90±1.23 | System usefulness 5.63±1.78 |
| 2 | The system helps me to perform research efficiently | 5.71±1.45 | |
| 3 | The system helps me to perform research effectively | 5.82±1.42 | |
| 4 | Learning to operate the system is easy | 5.44±1.13 | Ease of use 5.60±1.51 |
| 5 | I understand how to operate the system | 5.83±1.71 | |
| 6 | I can find information I need | 5.57±1.25 | Information quality 5.41±1.35 |
| 7 | The information provided by the system is easily understood | 5.45±1.12 | |
| 8 | The information provided by the system helps me to complete projects efficiently | 5.76±1.17 | |
| 9 | Using the system interface is enjoyable | 5.59±1.33 | Interface quality 5.45±1.37 |
| 10 | I enjoy using the system interface | 5.48±1.45 | |
| 11 | The system has all the functions and abilities I expected | 5.50±1.52 | Overall satisfaction 5.50±1.62 |
| 12 | I am satisfied with the overall system | 5.61±1.74 |
# System usefulness (items 1–3), ease of use (items 4–5), information quality (items 6–8), interface quality (items 9–10) and overall satisfaction (items 11–12).