Table 3.
Participants’ self-reported usability of each device according to (1) Intrinsic Motivation Inventory, (2) System Usability Scale, and (3) Acceptability questionnaire.
| Questionnaire domains |
Actigraph, median (IQR); min-max |
Actibelt, median (IQR); min-max |
Actiwatch, median (IQR); min-max |
Biovotion, median (IQR); min-max |
Hexoskina, median; min-max |
Mc10, median (IQR); min-max |
Wavelet, median (IQR); min-max |
||
| Intrinsic Motivation Inventory (n=22 questions; 7-point Likert scale) | |||||||||
|
|
Median | 4.3 (0.8); 3.9-5.4 |
4.1 (0.9); 3.3-5.1 |
4.7 (1.1); 3.0-5.4 |
5.2 (0.3); 4.0-5.5 |
3.6; 3.4-4.5 |
4.5 (1.1); 1.7-5.6 |
4.7 (0.8); 4.3-5.1 |
|
| Interest | 3.5 (1.4); 2.3-5.3 |
3.4 (1.3); 2.8-5.0 |
4.5 (1.8); 1.5-5.5 |
6.0 (1.0); 2.5-7.0 |
3.5; 3.5-4.3 |
3.5 (1.0); 1.0-4.3 |
5.3 (0.6); 4.7-7.0 |
||
| Competence | 6.7 (3.2); 2.7-7.0 |
6.2 (1.4); 5.3-7.0 |
6.3 (2.0); 4.7-7.0 |
6.5 (1.9); 3.4-7.0 |
4.3; 4.0-4.3 |
5.0 (1.7); 3.6-7.0 |
6.7 (0.8); 3.0-7.0 |
||
| Effort | 3.3 (2.9); 2.0-5.8 |
3.8 (2.5); 2.3-5.5 |
3.5 (3.0); 2.5-6.3 |
3.9 (1.6); 2.0-5.8 |
3.5; 2.0-3.8 |
4.3 (2.8); 1.8-6.8 |
4.0 (1.3); 1.0-5.5 |
||
| Pressure | 1.3 (2.0); 1.0-3.3 |
1.0 (0.3); 1.0-1.3 |
1.0 (2.0); 1.0-3.7 |
1.8 (1.7); 1.0-5.0 |
3.3; 2.0-3.7 |
3.0 (3.0); 1.0-4.0 |
2.0 (2.8); 1.0-4.0 |
||
| Choice | 6.9 (0.9); 6.0-7.0 |
6.9 (1.4); 3.0-7.0 |
7.0 (1.0); 5.5-7.0 |
6.8 (1.5); 5.3-7.0 |
4.3; 4.0-7.0 |
6.8 (1.8); 1.5-7.0 |
4.0 (0.0); 3.3-4.0 |
||
| Usefulness | 4.9 (2.5); 3.0-5.5 |
3.9 (2.1); 1.8-5.5 |
5.5 (3.0); 1.0-7.0 |
6.1 (1.7); 4.0-7.0 |
3.0; 1.8-3.3 |
5.0 (2.3); 1.0-6.8 |
6.8 (0.9); 5.0-7.0 |
||
| System Usability Scale (n=10 questions; 5-point Likert scale, score out of 100) | |||||||||
| Total score | 60.0 (15.6); 50.0-67.5 |
63.8 (12.5); 47.5-67.5 |
57.5 (15.0); 50.0-65.0 |
56.6 (13.1); 45.0- 70.0 |
47.5; 37.5- 57.5 |
55.0 (12.5); 45.0-65.0 |
56.3 (9.4); 50.0-62.5 |
||
| Acceptability questionnaire (n=26 questions; 6-point Likert scale) | |||||||||
| Median score | 3.6 (0.9); 2.8-5.2 |
3.4 (1.0); 2.8-4.7 |
3.2 (0.8); 3.0-4.0 |
3.6 (0.6); 3.0-4.8 |
3.2; 3.0-3.5 |
3.6 (0.4); 3.0-3.9 |
3.5 (0.4); 3.2-4.0 |
||
| Attitude | 5.3 (1.6); 3.7-6.0 |
5.2 (1.1); 4.7-6.0 |
4.3 (1.0); 4.0-6.0 |
4.7 (1.8); 3.3-6.0 |
4.0; 3.3-4.7 |
4.3 (1.7); 4.0-5.7 |
4.3 (1.6); 3.7-6.0 |
||
| Anxiety | 1.8 (2.5); 1.0-5.3 |
1.8 (2.6); 1.0-5.3 |
2.7 (1.7); 1.0-3.0 |
2.5 (2.9); 1.0-4.3 |
2.7; 2.3-2.7 |
3.0 (1.0); 2.3-3.7 |
2.3 (1.8); 1.0-5.0 |
||
| Facilitating conditions | 2.5 (4.8); 1.0-6.0 |
2.5 (2.6); 1.0-4.0 |
1.5 (1.0); 1.0-3.0 |
2.5 (2.3); 1.0-3.5 |
5.5; 3.5-6.0 |
3.0 (4.5); 1.0-6.0 |
1.5 (1.0); 1.0-2.5 |
||
| Perceived usefulness |
4.5 (2.7); 3.3-6.0 |
3.5 (2.3); 1.0-6.0 |
4.3 (2.3); 1.0-6.0 |
4.8 (1.5); 4.0-6.0 |
2.3; 1.3-3.0 |
3.3 (2.7); 1.0-6.0 |
5.2 (1.0); 4.0-6.0 |
||
| Perceived effort |
3.8 (3.0); 3.0-6.0 |
3.8 (1.5); 3.5-5.0 |
3.5 (0.0); 3.5-4.0 |
4.5 (2.3); 3.0-6.0 |
5.0; 3.5-5.0 |
3.5 (1.0); 3.0-5.5 |
3.5 (0.5); 3.0-6.0 |
||
| Behavioral intentions |
3.5 (1.4); 1.0-6.0 |
3.0 (1.2); 1.7-4.3 |
3.7 (1.0); 2.3-6.0 |
3.8 (0.8); 3.3-4.3 |
2.7; 2.7-3.0 |
3.0 (1.7); 2.7-4.7 |
3.8 (1.2); 3.0-4.3 |
||
| Psychological attachments | 3.8 (2.1); 1.5-6.0 |
3.8 (2.4); 1.0-6.0 |
4.5 (3.0); 3.0-6.0 |
4.5 (1.8); 2.5-6.0 |
2.5; 1.5-3.5 |
3.0 (2.0); 1.0-6.0 |
4.0 (1.5); 1.5-5.0 |
||
| Privacy | 2.5 (1.4); 1.0-5.0 |
3.0 (2.4); 1.0-6.0 |
2.5 (1.0); 1.0-5.0 |
3.3 (1.9); 1.0-4.5 |
2.5; 2.5-3.0 |
3.0 (3.0); 1.0-6.0 |
2.8 (1.6); 1.0-4.0 |
||
| Enjoyment | 3.7 (1.5); 2.7-4.7 |
4.0 (1.1); 2.0-4.3 |
3.0 (1.0); 2.7-3.7 |
2.7 (1.1); 2.0-4.3 |
3.7; 3.0-4.3 |
3.7 (1.7); 1.7-5.0 |
2.7 (0.3); 1.0-3.0 |
||
| Comfort | 3.3 (1.3); 2.0-5.3 |
4.3 (1.8); 2.3-4.3 |
4.0 (1.3); 2.7-4.3 |
4.0 (0.5); 3.7-4.7 |
3.0; 2.3-4.0 |
2.7 (1.3); 2.0-4.3 |
4.3 (0.7); 2.7-5.0 |
||
an=3 participants. Hexoskin was removed from the study after receiving the feedback from the first three participants to use it. The burden they reported was considered too high to ask any remaining participants to use it. Therefore, no IQR exists.