Table 3.
Usability assessment by patients comparing app versions from study 1 to study 2.
| Likert-type questions | Study 1 | Study 2 | P value | ||
|
|
N | Mean (SD) | N | Mean (SD) | |
| How precisely does your drawing represent your actual sensations? (0=very imprecisely, 10=very precisely) | 52 | 7.31 (2.33) | 51 | 7.20 (3.05) | .84 |
| How difficult was it to draw your sensations? (0=not difficult at all, 10=very difficult) | 52 | 3.38 (2.89) | 51 | 1.86 (2.16) | .003a |
| How well could you identify yourself with the body outline? (0=not at all, 10=very well) | 52 | 7.54 (2.59) | 51 | 8.73 (1.71) | .007a |
| How precisely do the chosen terms describe the nature of your sensations? (0=very imprecisely, 10=very precisely) | 52 | 6.58 (2.54) | 51 | 7.20 (2.47) | .21 |
| How difficult was it to evaluate the depth of your sensations (ie, skin, muscle, etc)? (0=not difficult at all, 10=very difficult) | 52 | 4.71 (3.18) | 51 | 3.27 (2.77) | .02a |
| How precisely do you rate your drawing with the electronic pen in comparison with a pencil drawing? (0=very imprecise, 10=very precise) | 52 | 7.52 (2.30) | 51 | 7.10 (3.27) | .45 |
| How much physical or mental stress was the drawing of your sensations? (0=no stress, 10=very much stress) | 51 | 1.43 (2.18) | 51 | 1.65 (2.21) | .62 |
| How comprehensible were the drawing instructions (eg, drawing examples and written instructions) for you? (0=not comprehensible, 10=very comprehensible) | 52 | 7.71 (2.41) | 50 | 8.32 (2.07) | .18 |
aStatistically significant difference (P<.05).