Table 2.

Timeline of Screen Usage Assessments with questionnaires in the ABCD Study®.

	Time Point of Administration
Assessment	Baseline	1-Year Follow-Up	2-Year Follow-Up	3-Year Follow-Up	4-Year Follow-Up
Screen usage/mobile device usage
Screen usage Questionnaire	P, C	P, C	P, C	P, C	P, C
Online Dating Questionnaire			C
Sleep and Screen usage			C	C	C
Social Media Addiction Questionnaire			C	C	C
Video Game Addiction Questionnaire			C	C	C

Note. “P”=parent report, “C”=child report,