Table 2.

Summary of the sensing data collected in the study.

Data type	Sensing data	Data description
Behavior	Acceleration	3-axis acceleration from mobile phone with sample rate of 50–100 Hz
	App usage	Number of apps used in the category of communication, entertainment, productivity, and social during every 15-min interval
	Call	Incoming and outgoing phone calls (and whether or not for incoming calls)
	SMS	Text message received (and whether they were read), sent, and drafted
	Screen on/off	Timestamps when screen was turned on and off
	Location	GPS (longitude and latitude) location of user
	Conversation	The onset and duration of conversation
	Sleep	Sleep duration, and bed and wake time
Environment	Light	The ambient light intensity collected using smartphone’s light sensor
	Sound	The volume of ambient sound