id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
dialog-451	Keefe-Cooperman, Kathleen	Digital Media and Preschoolers: Implications for Visual Spatial Development	2016	19	.pdf	application/pdf	8281	452	57	Parents or caregivers were asked to separately and specifically indicate their child’s ongoing average television viewing time, television programming choices, and digital device usage time to determine overall screen time as part of a structured interview protocol conducted in 2013-2014. b Digital device usage time has been collapsed into categories: 15 – 30 minutes; 30 – 45 minutes; 45 – 60 minutes.	cache/dialog-451.pdf	txt/dialog-451.txt