Table 4.
Responses from adults (n = 45) completing the usability questionnaire after using the mobile food record (mFR) application for 7.5 days.
| Statements and a Question Regarding Use of the Technology Assisted Dietary Assessment (TADA) mFR Application | Responses, n (%) | ||
|---|---|---|---|
| Strongly Agree or Agree | Neither Agree or Disagree | Disagree or Strongly Disagree | |
| I found it easy to include the fiducial marker in the picture of my meals. | 38 (84) | 4 (9) | 3 (7) |
| I found it easy to include the fiducial marker in the picture of my snacks. | 40 (89) | 3 (7) | 2 (4) |
| The screens were easy to read. | 45 (100) | 0 | 0 |
| The TADA application on the iPhone was easy to use. | 37 (82) | 5 (11) | 3 (7) |
| The directions about when to take an image of my meals and snacks were easy to follow. | 43 (96) | 2 (4) | 0 |
| The TADA iPhone interfered with my daily activities. | 15 (33) | 19 (42) | 11 (24) |
| The TADA iPhone interfered with my social interactions. | 15 (33) | 13 (29) | 17 (38) |
| I would like to participate in another study using the TADA iPhone application. | 33 (73) | 8 (18) | 4 (9) |
| The directions about how to use the TADA iPhone application were easy to follow. | 44 (98) | 1 (2) | 0 |
| Overall, the TADA iPhone application was a nuisance to use. | 5 (11) | 20 (44) | 20 (45) |
| Overall, the TADA iPhone application was enjoyable to use. | 22 (49) | 21 (47) | 2 (4) |
| The extra cords helped keep the TADA iPhone charged at all times. | 35 (78) | 8 (18) | 2 (4) |
| It was easy to use the TADA iPhone application when I was away from home. | 26 (58) | 7 (16) | 12 (27) |
| It was easy to carry two phones. | 25 (56) | 6 (13) | 14 (31) |
| More instructions about how to use the TADA iPhone application would have been helpful. | 8 (18) | 14 (31) | 23 (51) |
| Understanding the purpose of the TADA iPhone application motivated me to use it. | 28 (62) | 15 (33) | 2 (4) |
| I feel confident that the information collected by the TADA iPhone application will only be seen by researchers and not used against me. | 43 (96) | 1 (2) | 1 (2) |
| Never or almost never | Sometimes | Fairly or very often | |
| I had problems using the TADA iPhone application. | 23 (51) | 16 (36) | 6 (13) |
| Extremely or mostly comfortable | Somewhat comfortable | Not too comfortable or not comfortable at all | |
| Did you feel comfortable using the TADA iPhone application? | 38 (84) | 6 (13) | 1 (2) |