Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Characteristics of System Usability Scale (SUS) probability distributions for the 3 categories.
| Characteristic | SUS scores from all categories | SUS scores from all categories excluding physical activity apps | SUS scores from physical activity apps only |
| P value (Shapiro-Wilk) | .002 | .24 | .001 |
| Mean (SD) | 76.64 (15.12) | 68.05 (14.05) | 83.28 (12.39) |
| Median | 78.75 | 68.30 | 86.00 |
| Skewness | –0.52 | –0.39 | –0.69 |
| Kurtosis | 2.67 | 2.74 | 2.55 |
| Standard error | 1.4 | 1.97 | 1.53 |
