Table 1.
Average app use (total time) sensed by Effortless Assessment of Risk States from child’s smartphone during the 4-week passive sensing period (N=67)a.
| Category | Use time, mean (SD) |
| Streaming | 1 h 57 min (1 h 32 min) |
| YouTube | 1 h 18 min (1 h 23 min) |
| Communication | 48 min (1 h 17 min) |
| Gaming | 41 min (41 min) |
| Social media | 36 min (1 h 7 min) |
| SMS messages | 6 min (11 min) |
| Reading | 3 min (10 min) |
| Musicb | 2 min (5 min) |
| News | 1 min (2 min) |
aCategories are composites of specific apps, with the exception of SMS messages and YouTube. Multifunctional apps were listed in multiple categories (eg, Facebook in both communication and social media), so no category is mutually exclusive. SMS messages and YouTube were not mutually exclusive from composite categories (eg, YouTube was also counted within streaming).
bMusic frequently runs in the background and is only in the foreground when actively selecting songs or turning the app on and off (measured here).