Table 1. Table showing the four different analytical decisions that needed to be taken to analyze the data.

The decisions were: what day of the week to analyze, how to define sleep, how to define technology use, and which control variables to include. Each analytical decision had multiple analytical options that could have been taken. Each unique combination of different analytical options that could be implemented to analyze the data is a specification. In total, this study encompassed 120 defined specifications.

Analytical decision	Day of the week	Sleep	Technology use	Control variables
Analytical options	Weekday	Bedtime (retrospective)	Participation (time-use diary)	Demographics
	Weekend day	Bedtime (time-use diary)	Before bedtime (time-use diary)	Demographics + child-level
		Total time sleeping (retrospective)	Total time spent (time-use diary)	Demographics + mother-level
			Total time spent (retrospective)	Demographics + family-level
				All control variables